Question

What is the surface area of the prism shown A 1.5 square meters 05 m 1' 12 m B 1.8 square meters \ f I 3 C 2.16 square meters 1.3 m D 2.4 square meters 5

Answer 1

1.3 x 0.4 x 2 = 1.04
0.5 x 0.4 = 0.2
($\frac{1}{2}$(0.5 x 1.2)) x 2 = 0.6

1.04 + 0.2 + 0.6 = 1.84m²

Answer 2

Surface area of right angled triangle

= (1/2)*0.5*1.2 = 0.3

For the 2 triangles = 2 *0.3 = 0.6

Area of rectangle 1 = 0.5 * 0.4 = 0.2

 Area of rectangle 2 = 1.2 * 0.4 = 0.48

Area of rectangle 3 = 1.3 * 0.4 = 0.52

Total = 0.6 + 0.2 + 0.48 + 0.52 = 1.8

Total surface area = 1.8 square meters.

Option B.