{"id":4010,"date":"2026-07-25T14:31:20","date_gmt":"2026-07-25T14:31:20","guid":{"rendered":"https:\/\/physicscatalyst.com\/testprep\/uncategorized\/area-and-perimeter-class-9-online-test\/"},"modified":"2026-07-25T14:31:20","modified_gmt":"2026-07-25T14:31:20","slug":"area-and-perimeter-class-9-online-test","status":"publish","type":"post","link":"https:\/\/physicscatalyst.com\/testprep\/uncategorized\/area-and-perimeter-class-9-online-test\/","title":{"rendered":"Area and perimeter class 9 online test"},"content":{"rendered":"<script type=\"text\/javascript\" >\ndocument.addEventListener(\"DOMContentLoaded\", function(event) { \nif(!window.jQuery) alert(\"The important jQuery library is not properly loaded in your site. Your WordPress theme is probably missing the essential wp_head() call. You can switch to another theme and you will see that the plugin works fine and this notice disappears. If you are still not sure what to do you can contact us for help.\");\n});\n<\/script>  \n  \n<div  id=\"watupro_quiz\" class=\"quiz-area single-page-quiz\">\n<p id=\"submittingExam529\" style=\"display:none;text-align:center;\">Please wait...<br><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/physicscatalyst.com\/testprep\/wp-content\/plugins\/watupro\/img\/loading.gif\" width=\"16\" height=\"16\"><\/p>\n\n<div class=\"watupro-exam-description\" id=\"description-quiz-529\"><p><strong>General Instructions<\/strong><\/p>\n<ul>\n<li>Your test contains multiple-choice questions with only one answer-type question. There are a total of 10 questions<\/li>\n<li>This is a 20 min test. Please make sure you complete it in the stipulated time<\/li>\n<li>You can finish this test any time using the 'Submit' button.<\/li>\n<\/ul>\n<\/div>\n\n<form action=\"\" method=\"post\" class=\"quiz-form\" id=\"quiz-529\"  enctype=\"multipart\/form-data\" >\n<div class='watu-question ' id='question-1' style=';'><div id='questionWrap-1'  class='   watupro-question-id-8726'>\n\t\t\t<div class='question-content'><div><span class='watupro_num'>1. <\/span>Area of the sector of the circle of radius r cm\u00a0 having 120 degree angle is given by<\/div><input type='hidden' name='question_id[]' id='qID_1' value='8726' class='watupro-question-id'\/><input type='hidden' id='answerType8726' class='answerTypeCnt1' value='radio'><!-- end question-content--><\/div><div class='question-choices watupro-choices-columns '  id='questionChoices8726'><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-8726[]' id='answer-id-34852' class='answer   answerof-8726  ' value='34852'   \/><label for='answer-id-34852' id='answer-label-34852' class=' answer'><span>$\\pi r^2\/3$<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-8726[]' id='answer-id-34853' class='answer   answerof-8726  ' value='34853'   \/><label for='answer-id-34853' id='answer-label-34853' class=' answer'><span>$\\pi r^2\/4$<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-8726[]' id='answer-id-34854' class='answer   answerof-8726  ' value='34854'   \/><label for='answer-id-34854' id='answer-label-34854' class=' answer'><span>$\\pi r^2\/6$<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-8726[]' id='answer-id-34855' class='answer   answerof-8726  ' value='34855'   \/><label for='answer-id-34855' id='answer-label-34855' class=' answer'><span>$\\pi r^2\/2$<\/span><\/label><\/div><!-- end question-choices--><\/div><!-- end questionWrap--><\/div><\/div><div class='watu-question ' id='question-2' style=';'><div id='questionWrap-2'  class='   watupro-question-id-8727'>\n\t\t\t<div class='question-content'><div><span class='watupro_num'>2. <\/span>let a,b,c are the length of the sides of the triangles. R is the radius of\u00a0 circumcircle, the area of the triangle<\/div><input type='hidden' name='question_id[]' id='qID_2' value='8727' class='watupro-question-id'\/><input type='hidden' id='answerType8727' class='answerTypeCnt2' value='radio'><!-- end question-content--><\/div><div class='question-choices watupro-choices-columns '  id='questionChoices8727'><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-8727[]' id='answer-id-34856' class='answer   answerof-8727  ' value='34856'   \/><label for='answer-id-34856' id='answer-label-34856' class=' answer'><span>abc\/2R<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-8727[]' id='answer-id-34857' class='answer   answerof-8727  ' value='34857'   \/><label for='answer-id-34857' id='answer-label-34857' class=' answer'><span>abc\/4R<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-8727[]' id='answer-id-34858' class='answer   answerof-8727  ' value='34858'   \/><label for='answer-id-34858' id='answer-label-34858' class=' answer'><span>R(a+b+c)\/2<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-8727[]' id='answer-id-34859' class='answer   answerof-8727  ' value='34859'   \/><label for='answer-id-34859' id='answer-label-34859' class=' answer'><span>R(a+b+c)\/4<\/span><\/label><\/div><!-- end question-choices--><\/div><!-- end questionWrap--><\/div><\/div><div class='watu-question ' id='question-3' style=';'><div id='questionWrap-3'  class='   watupro-question-id-8728'>\n\t\t\t<div class='question-content'><div><span class='watupro_num'>3. <\/span>The heron formula for area of the triangle of sides a,b,c is given by<\/div><input type='hidden' name='question_id[]' id='qID_3' value='8728' class='watupro-question-id'\/><input type='hidden' id='answerType8728' class='answerTypeCnt3' value='radio'><!-- end question-content--><\/div><div class='question-choices watupro-choices-columns '  id='questionChoices8728'><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-8728[]' id='answer-id-34860' class='answer   answerof-8728  ' value='34860'   \/><label for='answer-id-34860' id='answer-label-34860' class=' answer'><span>$\\sqrt {(s(s-a)(s-b)(s-c)}$ where s= a+b+c\/2<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-8728[]' id='answer-id-34861' class='answer   answerof-8728  ' value='34861'   \/><label for='answer-id-34861' id='answer-label-34861' class=' answer'><span>$\\sqrt {(s(s-a)(s-b)(s-c)}$ where s= a+b+c\/3<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-8728[]' id='answer-id-34862' class='answer   answerof-8728  ' value='34862'   \/><label for='answer-id-34862' id='answer-label-34862' class=' answer'><span>$\\sqrt {(s(s-a)(s-b)(s-c)}$ where s= a+b+c<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-8728[]' id='answer-id-34863' class='answer   answerof-8728  ' value='34863'   \/><label for='answer-id-34863' id='answer-label-34863' class=' answer'><span>None of these<\/span><\/label><\/div><!-- end question-choices--><\/div><!-- end questionWrap--><\/div><\/div><div class='watu-question ' id='question-4' style=';'><div id='questionWrap-4'  class='   watupro-question-id-8729'>\n\t\t\t<div class='question-content'><div><span class='watupro_num'>4. <\/span>A triangle with sides 3 units, 4 units and 5 units has the area as<\/div><input type='hidden' name='question_id[]' id='qID_4' value='8729' class='watupro-question-id'\/><input type='hidden' id='answerType8729' class='answerTypeCnt4' value='radio'><!-- end question-content--><\/div><div class='question-choices watupro-choices-columns '  id='questionChoices8729'><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-8729[]' id='answer-id-34864' class='answer   answerof-8729  ' value='34864'   \/><label for='answer-id-34864' id='answer-label-34864' class=' answer'><span>12 sq units<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-8729[]' id='answer-id-34865' class='answer   answerof-8729  ' value='34865'   \/><label for='answer-id-34865' id='answer-label-34865' class=' answer'><span>4 sq units<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-8729[]' id='answer-id-34866' class='answer   answerof-8729  ' value='34866'   \/><label for='answer-id-34866' id='answer-label-34866' class=' answer'><span>8 sq units<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-8729[]' id='answer-id-34867' class='answer   answerof-8729  ' value='34867'   \/><label for='answer-id-34867' id='answer-label-34867' class=' answer'><span>6 sq units<\/span><\/label><\/div><!-- end question-choices--><\/div><!-- end questionWrap--><\/div><\/div><div class='watu-question ' id='question-5' style=';'><div id='questionWrap-5'  class='   watupro-question-id-8730'>\n\t\t\t<div class='question-content'><div><span class='watupro_num'>5. <\/span>Calculate the length of the arc of a circle if the radius is 3.5 cm and the angle at the centre is 60<sup>o<\/sup><\/div><input type='hidden' name='question_id[]' id='qID_5' value='8730' class='watupro-question-id'\/><input type='hidden' id='answerType8730' class='answerTypeCnt5' value='radio'><!-- end question-content--><\/div><div class='question-choices watupro-choices-columns '  id='questionChoices8730'><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-8730[]' id='answer-id-34868' class='answer   answerof-8730  ' value='34868'   \/><label for='answer-id-34868' id='answer-label-34868' class=' answer'><span>3.67 cm<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-8730[]' id='answer-id-34869' class='answer   answerof-8730  ' value='34869'   \/><label for='answer-id-34869' id='answer-label-34869' class=' answer'><span>4.21 cm<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-8730[]' id='answer-id-34870' class='answer   answerof-8730  ' value='34870'   \/><label for='answer-id-34870' id='answer-label-34870' class=' answer'><span>3.21 cm<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-8730[]' id='answer-id-34871' class='answer   answerof-8730  ' value='34871'   \/><label for='answer-id-34871' id='answer-label-34871' class=' answer'><span>5.24 cm<\/span><\/label><\/div><!-- end question-choices--><\/div><!-- end questionWrap--><\/div><\/div><div class='watu-question ' id='question-6' style=';'><div id='questionWrap-6'  class='   watupro-question-id-8731'>\n\t\t\t<div class='question-content'><div><span class='watupro_num'>6. <\/span>The sides of a triangular plot are in the ratio 3: 5: 7; its perimeter is 300 m. Find its area<\/div><input type='hidden' name='question_id[]' id='qID_6' value='8731' class='watupro-question-id'\/><input type='hidden' id='answerType8731' class='answerTypeCnt6' value='radio'><!-- end question-content--><\/div><div class='question-choices watupro-choices-columns '  id='questionChoices8731'><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-8731[]' id='answer-id-34872' class='answer   answerof-8731  ' value='34872'   \/><label for='answer-id-34872' id='answer-label-34872' class=' answer'><span>$1500 \\sqrt 3$<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-8731[]' id='answer-id-34873' class='answer   answerof-8731  ' value='34873'   \/><label for='answer-id-34873' id='answer-label-34873' class=' answer'><span>$1500 \\sqrt 2$<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-8731[]' id='answer-id-34874' class='answer   answerof-8731  ' value='34874'   \/><label for='answer-id-34874' id='answer-label-34874' class=' answer'><span>$500 \\sqrt 3$<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-8731[]' id='answer-id-34875' class='answer   answerof-8731  ' value='34875'   \/><label for='answer-id-34875' id='answer-label-34875' class=' answer'><span>$500 \\sqrt 2$<\/span><\/label><\/div><!-- end question-choices--><\/div><!-- end questionWrap--><\/div><\/div><div class='watu-question ' id='question-7' style=';'><div id='questionWrap-7'  class='   watupro-question-id-8732'>\n\t\t\t<div class='question-content'><div><span class='watupro_num'>7. <\/span>Find the area of a quadrant of a circle whose circumference is 44 cm.<\/div><input type='hidden' name='question_id[]' id='qID_7' value='8732' class='watupro-question-id'\/><input type='hidden' id='answerType8732' class='answerTypeCnt7' value='radio'><!-- end question-content--><\/div><div class='question-choices watupro-choices-columns '  id='questionChoices8732'><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-8732[]' id='answer-id-34876' class='answer   answerof-8732  ' value='34876'   \/><label for='answer-id-34876' id='answer-label-34876' class=' answer'><span>48.5 cm<sup>2<\/sup><\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-8732[]' id='answer-id-34877' class='answer   answerof-8732  ' value='34877'   \/><label for='answer-id-34877' id='answer-label-34877' class=' answer'><span>58.5 cm<sup>2<\/sup><\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-8732[]' id='answer-id-34878' class='answer   answerof-8732  ' value='34878'   \/><label for='answer-id-34878' id='answer-label-34878' class=' answer'><span>36.5 cm<sup>2<\/sup><\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-8732[]' id='answer-id-34879' class='answer   answerof-8732  ' value='34879'   \/><label for='answer-id-34879' id='answer-label-34879' class=' answer'><span>38.5 cm<sup>2<\/sup><\/span><\/label><\/div><!-- end question-choices--><\/div><!-- end questionWrap--><\/div><\/div><div class='watu-question ' id='question-8' style=';'><div id='questionWrap-8'  class='   watupro-question-id-8733'>\n\t\t\t<div class='question-content'><div><span class='watupro_num'>8. <\/span>If r is the radius of incircle of triangle of sides a,b,c, then area is given by<\/div><input type='hidden' name='question_id[]' id='qID_8' value='8733' class='watupro-question-id'\/><input type='hidden' id='answerType8733' class='answerTypeCnt8' value='radio'><!-- end question-content--><\/div><div class='question-choices watupro-choices-columns '  id='questionChoices8733'><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-8733[]' id='answer-id-34880' class='answer   answerof-8733  ' value='34880'   \/><label for='answer-id-34880' id='answer-label-34880' class=' answer'><span>r(a+b+c)\/2<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-8733[]' id='answer-id-34881' class='answer   answerof-8733  ' value='34881'   \/><label for='answer-id-34881' id='answer-label-34881' class=' answer'><span>(a+b+c)\/2r<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-8733[]' id='answer-id-34882' class='answer   answerof-8733  ' value='34882'   \/><label for='answer-id-34882' id='answer-label-34882' class=' answer'><span>r(a+b+c)\/4<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-8733[]' id='answer-id-34883' class='answer   answerof-8733  ' value='34883'   \/><label for='answer-id-34883' id='answer-label-34883' class=' answer'><span>r\\(a+b+c)\/4r<\/span><\/label><\/div><!-- end question-choices--><\/div><!-- end questionWrap--><\/div><\/div><div class='watu-question ' id='question-9' style=';'><div id='questionWrap-9'  class='   watupro-question-id-8734'>\n\t\t\t<div class='question-content'><div><span class='watupro_num'>9. <\/span>The wheel of a truck has an outer radius of 28 cm. Calculate how far the truck travels after one complete turn of the wheel?<\/div><input type='hidden' name='question_id[]' id='qID_9' value='8734' class='watupro-question-id'\/><input type='hidden' id='answerType8734' class='answerTypeCnt9' value='radio'><!-- end question-content--><\/div><div class='question-choices watupro-choices-columns '  id='questionChoices8734'><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-8734[]' id='answer-id-34884' class='answer   answerof-8734  ' value='34884'   \/><label for='answer-id-34884' id='answer-label-34884' class=' answer'><span>154 cm<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-8734[]' id='answer-id-34885' class='answer   answerof-8734  ' value='34885'   \/><label for='answer-id-34885' id='answer-label-34885' class=' answer'><span>180 cm<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-8734[]' id='answer-id-34886' class='answer   answerof-8734  ' value='34886'   \/><label for='answer-id-34886' id='answer-label-34886' class=' answer'><span>176 cm<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-8734[]' id='answer-id-34887' class='answer   answerof-8734  ' value='34887'   \/><label for='answer-id-34887' id='answer-label-34887' class=' answer'><span>204 cm<\/span><\/label><\/div><!-- end question-choices--><\/div><!-- end questionWrap--><\/div><\/div><div class='watu-question ' id='question-10' style=';'><div id='questionWrap-10'  class='   watupro-question-id-8735'>\n\t\t\t<div class='question-content'><div><span class='watupro_num'>10. <\/span>One diagonal of a rhombus is twice as long as the other diagonal. If the rhombus has area 128 cm<sup>2<\/sup>, find the length of the shorter diagonal.<\/div><input type='hidden' name='question_id[]' id='qID_10' value='8735' class='watupro-question-id'\/><input type='hidden' id='answerType8735' class='answerTypeCnt10' value='radio'><!-- end question-content--><\/div><div class='question-choices watupro-choices-columns '  id='questionChoices8735'><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-8735[]' id='answer-id-34888' class='answer   answerof-8735  ' value='34888'   \/><label for='answer-id-34888' id='answer-label-34888' class=' answer'><span>$8 \\sqrt 2$<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-8735[]' id='answer-id-34889' class='answer   answerof-8735  ' value='34889'   \/><label for='answer-id-34889' id='answer-label-34889' class=' answer'><span>$8 \\sqrt 3$<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-8735[]' id='answer-id-34890' class='answer   answerof-8735  ' value='34890'   \/><label for='answer-id-34890' id='answer-label-34890' class=' answer'><span>$6 \\sqrt 2$<\/span><\/label><\/div><div class='watupro-question-choice  ' dir='auto' ><input type='radio' name='answer-8735[]' id='answer-id-34891' class='answer   answerof-8735  ' value='34891'   \/><label for='answer-id-34891' id='answer-label-34891' class=' answer'><span>$6 \\sqrt 3$<\/span><\/label><\/div><!-- end question-choices--><\/div><!-- end questionWrap--><\/div><\/div><div style='display:none' id='question-11'>\n\t<div class='question-content'>\n\t\t<img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/physicscatalyst.com\/testprep\/wp-content\/plugins\/watupro\/img\/loading.gif\" width=\"16\" height=\"16\" alt=\"Loading...\" title=\"Loading...\" \/>&nbsp;Loading...\t<\/div>\n<\/div>\n\n<br \/>\n\t\n\t\t\t<div class=\"watupro_buttons flex \" id=\"watuPROButtons529\" >\n\t\t  <div 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