 # Coordinate Geometry Exercise 7.1

In this page we have NCERT Solutions for Class 10 Maths Chapter 7:Coordinate Geometry for Exercise 7.1 on pages 161 and 162. Hope you like them and do not forget to like , social_share and comment at the end of the page.
Question 1.Find the distance between the following pairs of points :
(i) (2, 3), (4, 1) (ii) (-5, 7), (-1, 3) (iii) (a,b), (-a,-b)
Question 2. Find the distance between the points (0, 0) and (36, 15). Can you now find the distance between the two towns A and B .
Question 3. Determine if the points (1, 5), (2, 3) and (-2, -11) are collinear.
Question 4. Check whether (5, -2), (6, 4) and (7, -2) are the vertices of an isosceles triangle
Question 5. In a classroom, 4 friends are seated at the points A, B, C and D as shown below. Champaand Chameli walk into the class and after observing for a few minutes Champa asks Chameli,
“Don’t you think ABCD is a square?” Chameli disagrees. Using distance formula, find which of them is correct.
Question 6. Name the type of quadrilateral formed, if any, by the following points, and give reasons for your answer:
(i) (-1, -2), (1, 0), (-1, 2), (-3, 0)
(ii) (-3, 5), (3, 1), (0, 3), (-1, -4)
iii) (4,5) ,(7,6), (4,3) (1,2)
Question 7. Find the point on  the x-axis which is equidistant from (2, –5) and (–2, 9).
Question 8. . Find the values of y for which the distance between the points P(2, – 3) and Q(10, y) is 10 units
Question 9. . If Q(0, 1) is equidistant from P(5, –3) and R(x, 6), find the values of x. Also find the distances QR and PR.
Question 10. Find a relation between x and y such that the point (x, y) is equidistant from the point
(3, 6) and (– 3, 4).
Solution 1:
Distance between the points AB is given by Solution 2:
Let P(0,0)  and Q(36,15)  be the given points.
Distance between the points PQ is given b The position of town A and B can be represented as points P and Q respectively,So distance between town will be 39 km
Solution3:
Lets us denote point by P(1,5) , Q(2,3)  and R(-2,-11)
If the points are not collinear, then we should be able to form the triangle
Lets us find the length of PQ, QR and PR  by distance formula Clearly  None of these is true
PQ+QR=PR
PR+PQ=QR
PQ=QR+PR
Hence  they are not collinear

Solution 4)
Lets us denote point by P(5,-2) , Q(6,4)  and R(7,-2)
Lets us find the length of PQ, QR and PR  by distance formula Now PQ =QR  ,so it is an isosceles triangle
Solution 5)
As per the figure given,The coordinates of the points A,B,C and D  are (3,4), (6,7) ,(9,4)  and (6,1)
Lets us find the length of AB, BC ,CD  and AD by distance formula So all the sides are equal. But we cannot  still say that it is square as rhombus has all  the sides  equal also.
Now we know that a square has both the diagonal equal also,So lets us calculate the diagonal’s Hence AC=BD
So it is a square.
So  champa is correct
Solution 6)
In these type of problem, we need to find of length of each segment, then check with the properties of different type of quadrilateral
i.e for points A,B,C and D
Line segments are AB,BC,AC,CD,AD  and  BD
We need to find the length of each of these
i) (– 1, – 2), (1, 0), (– 1, 2), (– 3, 0) Here the side AB,BC,CD and AD are equal and diagonal AC and BD are equal. So this is a square
ii)  (–3, 5), (3, 1), (0, 3), (–1, – 4) Now here  AC+BC=AB
So  that means ABC are collinear points.
So it is not a quadrilateral infact
iii) (4,5) ,(7,6), (4,3) (1,2) Now AB=CD  and BC=DA
Now it could be rectangle or parallelogram
But diagonal  AC is not equal diagonal  BD
So It is a parallelogram
Solution 7:
Since the point lies on X axis, the point should be of the form (a,0)
Now (a,0) is equidistant from  both the given points Squaring both the sides
(x-2)2 + (0+5)2 =(x+2)2 + (0-9)2
Solving it  we get
x=-7
Solution 8:
Acoording to the question
PQ=10 Squaring both the sides
y2 +6y-27=0
(y+9)(y-3)=0
So y=-9 or 3
Solution   9:
Now
QP=QR Squaring both the sides
25+16=x2 +25
x= -4 or 4
So point  R is either (4,6)  or (-4,6) Solution: 10
Let the point P(x,y) is equidistant from the point Q( 3,6)  and R(-3,4)
PQ=PR Squaring both the sides
x2  -6x+9 +y2-12y +36=x2 +6x+9 +y2 -8y+16
-12x-4y+20=0
Or
3x+y-5=0  ( dividing by -4)

Reference Books for class 10

Given below are the links of some of the reference books for class 10 math.

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

### Practice Question

Question 1 What is $1 - \sqrt {3}$ ?
A) Non terminating repeating
B) Non terminating non repeating
C) Terminating
D) None of the above
Question 2 The volume of the largest right circular cone that can be cut out from a cube of edge 4.2 cm is?
A) 19.4 cm3
B) 12 cm3
C) 78.6 cm3
D) 58.2 cm3
Question 3 The sum of the first three terms of an AP is 33. If the product of the first and the third term exceeds the second term by 29, the AP is ?
A) 2 ,21,11
B) 1,10,19
C) -1 ,8,17
D) 2 ,11,20

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