 Question 1.
The sum of the interior angles of a regular polygon is twice the sum of the exterior angles. Find the number of sides of the polygon

Question 2.
Three angles of the quadrilaterals are in the ratio 2:3:4. The sum of the least and the greatest of these three angles is equal to 180°. Find all the angles of the quadrilateral

Question 3.
The exterior angle of a regular polygon is one-fifth of its interior angle. How many sides has the polygon?

Question 4.
One of the angle in the parallelogram is 80°. Find the other angles in the parallelogram

Question 5.
The angles of the quadrilateral is in the ratio 1:2:3:4. Find all the angles

Question 6.
One of the diagonals of a rhombus is equal to its sides. Find the measures of all the angles of the rhombus

Question 7.
In a parallelogram ABCD, the bisectors of ∠ A and ∠ B meet at O. Find ∠ AOB. Question 8.
Find the value of x in the trapezium ABCD Question 9.
The diagonals of a rhombus are 8 cm and 15 cm. Find its side.

Question 10.
Find the values of x and y in the following parallelogram. Reference Books for class 8 Math

Given below are the links of some of the reference books for class 8 Math.

1. Mathematics Foundation Course for JEE/Olympiad : Class 8 This book can take students maths skills further. Only buy if child is interested in Olympiad/JEE foundation courses.
2. Mathematics for Class 8 by R S Aggarwal Detailed Mathematics book to clear basics and concepts. I would say it is a must have book for class 8 student.
3. Pearson Foundation Series (IIT -JEE / NEET) Physics, Chemistry, Maths & Biology for Class 8 (Main Books) | PCMB Combo : These set of books could help your child if he aims to get extra knowledge of science and maths. These would be helpful if child wants to prepare for competitive exams like JEE/NEET. Only buy if you can provide help to the child while studying.
4. Reasoning Olympiad Workbook - Class 8 :- Reasoning helps sharpen the mind of child. I would recommend students practicing reasoning even though they are not appearing for Olympiad.

You can use above books for extra knowledge and practicing different questions.

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