Question

7. Calculate the area of given quadrilateral by dividing it into a rectangle and a triangle. ​

Answer 1

By diving the figure,

The length of the rectangle-30 cm

The breadth of the rectangle=20 cm

The area of the rectangle-length X breadth.

= 30 X 20

=600 cm²

• The base of the triangle-45-20 cm

=25cm

The height of the triangle=30cm

The area of the triangle = X 25 X 30

=375cm²

Total area = area of rectangle+are of triangle

=600 + 375

=975 cm²

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Answer 2

Ar( rect. ABCO) = L×B

= 30 × 20 = 600m^2

Ar(tri.COD) = 1/2 × p × b

= 1/2 × (45-20) × 30

= 25 × 30

÷ 2

= 25 × 15

375m^2

Total Area of Fig.ABCD

=Ar(rect.ABCO) + Ar(tri.COD)

=> 600m^2 + 375 m^2

= 975 m^2