 # NCERT Solutions for Class 10 Maths Chapter 7 Free PDF Download

## NCERT Solutions for Class 10 Maths Chapter 7 – Coordinate Geometry

NCERT Solutions for class 10 maths chapter 7 – Coordinate geometry will help you to make your foundation strong on the concepts of Coordinate geometry class 10. The study of Coordinate geometry class 10  and solving the problems will help you to solve complex problems easily. Coordinate geometry class 10 covers all the exercises provided in the NCERT textbook.

CBSE Class 10 Maths Chapter 7 NCERT Solutions are prepared by our expert at Toppr to help you to prepare for your exams in a better way and enhance your score. Coordinate geometry class 10  provide step by step solutions for the questions given in class 10 maths NCERT textbook as per CBSE Board guidelines and are also prepared according to the exam pattern. With the Toppr app, you can download NCERT Solutions for class 10 maths chapter 7 for free. In case you have a doubt while you are studying, Coordinate geometry class 10, for this we have a team of teachers who prove live doubt solving sessions only for you.

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### CBSE Class 10 Maths Chapter 7 NCERT Solutions

Coordinate geometry class 10 explains the distance between the two points whose coordinates, area of the triangle formed by three given points, coordinates of the point which divides a line segment joining two points in a given ratio, Distance formula, Section formula, Area of a Triangle. Also, the questions are solved with alternative solutions and diagrammatic representation.

### Coordinate Geometry Sub-topics

You can download NCERT Solutions for Class 10 Maths Chapter 7 PDF for free by clicking on the button below. ### NCERT Solutions for Class 10 Maths Chapter 7

Q.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

Solution

Distance between two points ( x1 , y1 ) and ( x2 , y) is

( x−−−−−−−−−−−−−−−− 1 x2)2 + ( y1 y2)2 (i) Distance between (2, 3) and (4, 1)

is

= (2 −−−−−−−−−−−−− − 4 )2 + (3 − 1 )2 = (−2 −−−−−−−− (2)2 + )2 = √ 4+4 −−− = 8√ = 2 2√

(ii) Distance between (−5, 7) and (−1, 3)

is

= (−5 −−−−−−−−−−−−−−−−− − (−1) )2 + (7 − 3 )2 = (−4 −−−−−−−− (4)2 + )2 = √ 16 −−−−− + 16 = √ −− 32= 4 2√

(iii )Distance between (a, b) and (−a, −b

is

= (a−−−−−−−−−−−−−−−−−− (−a) )2 + (b − (−b) )2 = (2a −−−−−−−− )2 + (2b )2 = 4 −−−−−−− a2 + 4 b2 = 2 a−−−−− 2 + b2 #465323 Topic: Distance Between Two Points

Q.2 Find the distance between the points (0, 0) and (36, 15) .

Solution

Distance Between two given point=

( x−−−−−−−−−−−−−−−− 2 x1)2 + ( y2 y1)2 Here

x1 = 0, x2 = 26 and y1 = 0, y2 = 15 Distance between the points (0, 0) and (36, 15)

(36 −−−−−−−−−−−−−− − 0 )2 + (15 − 0 )2 = +36−−−−−−− 2 152 = √ 1296 −−−−−−− + 225 = √ 1521 −−− = 39

Q.3 Determine if the points (1, 5), (2, 3) and (−2, −11) are collinear.

Solution

Three points A , B and

are collinear if

AB+BC = AC

Here, point A(1, 5), B(2, 3) and

C(−2, −11). AB = (2 −−−−−−−−−−−−− − 1 )2 + (3 − 5 )2 = 1−−−−−−− 2 +(− 22 ) = √ 1+4 −−− = 5√ = 2.23 BC = ((−2) −−−−−−−−−−−−−−−−−−−−−− − (2) )2 + ((−11) − (3) )2 = (−4 −−−−−−−−−− )2 + (−14 )2 = √ 16 −−−−−− + 196 = √ −−− 212 = 14.56 AC = ((−2) −−−−−−−−−−−−−−−−−−−−−− − (1) )2 + ((−11) + (5) )2 = (− 3 )2 + (−16 )2 = √ 9 −−−−− + 256 = √ −−− 265 = 16.27 AB+BC = 2.23 + 14.56 = 16.79

AB+BC AC

Hence the given points are collinear.

Q. 4 Find the ratio in which the line segment joining the points (−3, 10) and (6, −8) is divided by (−1, 6)

Solution

Let the required ratio be

m1 : m

Take ( x1 , y1 ) = (−3, 10); ( x2 , y2 ) = (6, −8) and

(x,y) = (−1, 6) x −1 = = m1xmm2 1 1 + m2x

+ ×6+ m

m2 ×−3 m1 + m2 ⇒− m1 m2 =6m − 3 m

⇒− m1 −6 m1 =−3 m2 + m

⇒ −7 m1 = −2 m2 m1m

= 27 The required ratio is 2:7

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