Question

4. Solve the following questions.
(a) Find the area of the trapezium in Fig. 4.
Н
80 units
50 units
22.3 m
100 units
20 m
(b) Find the area of the sail in Fig. 5.
Fig. 4
22 m
16.8 m
Fig. 5​

Answer 1

Euler's formula for solids ⇒ Faces+ Vertices− Edges =2

The given solid in the image is a Cuboid

∴ Faces of the cuboid =6

Vertices=8

Edges =12

putting these values in Euler's formula ⇒6+8−12=2

Hence, Verified.