NCERT solutions for class 10 Maths chapter 7 Coordinate Geometry (Exercise 7.3)

NCERT solutions for class 10 Maths


Chapter 7


Coordinate Geometry


Exercise 7.3


Ex 7.3 Question 1.


Find the area of the triangle whose vertices are:

(i) (2, 3), (-1, 0), (2, -4)

(ii) (-5, -1), (3, -5), (5, 2)

Solution:


Ex 7.3 Question 2.


In each of the following find the value of ‘k’, for which the points are collinear.

(i) (7, -2), (5, 1), (3, -k)

(ii) (8, 1), (k, -4), (2, -5)

Solution:


Ex 7.3 Question 3.


Find the area of the triangle formed by joining the mid-points of the sides of the triangle whose vertices are (0, -1), (2, 1) and (0, 3). Find the ratio of this area to the area of the given triangle.

Solution:


Ex 7.3 Question 4.


Find the area of the quadrilateral whose vertices, taken in order, are

(-4, -2), (-3, -5), (3, -2) and (2, 3).

Solution:


Ex 7.3 Question 5.


You have studied in Class IX that a median of a triangle divides it into two triangles of equal areas. Verify this result for ΔABC whose vertices are A (4, – 6), B (3, – 2) and C (5, 2).

Solution: