Question

Work out the surface area

Answer 1

a = 120 cm2

Explanation:

The prism has 5 sides:

2 triangles, base: 3 hight: 4, each

3 rectangles, 3x9, 5x9 and 4x9

Add the areas on each side to the total area:

`a=(2)((3)(4))/(2) +(3)(9)+(5)(9)+(4)(9)=12+27+45+36`

`a=120cm^(2)`

Hope this helps