4. Solve the following questions.(a) Find the area of the trapezium in

1.	4. Solve the following questions.(a) Find the area of the trapezium in Fig. 4.Н80 units50 units22.3 m100 units20 m(b) Find the area of the sail in Fig. 5.Fig. 422 m16.8 mFig. 5
Answer» 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.

4. Solve the following questions.(a) Find the area of the trapezium in Fig. 4.Н80 units50 units22.3 m100 units20 m(b) Find the area of the sail in Fig. 5.Fig. 422 m16.8 mFig. 5

Answer»

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.