Section Formula CBSE NCERT Solutions Chapter 7 Exercise 7.3 Question 4
4. Find the area of the quadrilateral whose vertices taken in order are (-4, -2), (-3, -5), (3, -2) and (2, 3).
Solution:
Area of Quadrilateral ABCD = Area of Triangle ABD + Area of Triangle BCD (1)
Using formula to find area of triangle:
Area of
=
Area of
sq units (2)
Again using formula to find area of triangle:
Area of
=
Area of
sq units (3)
Putting (2) and (3) in (1), we get
Area of Quadrilateral ABCD = 11.5 + 16.5 = 28 sq units
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