Question

I really do not understand these questions at all watched a video and attempted it still got it wrong

Answer 1

540 cm₂

Explanation:

Area of right triangular prism:

`\sf \boxed{Area = (b_1+b_2+b_3)*l + bh}\\\\`

`\sf \text{where $b_1$, $b_2$ and $b_3$ are the sides of the triangle l is the length of the rectangle}\\\\ \text{and b is the base of the triangle and h is the altitude of the triangle}`

b₁ = 12 cm ; b₂ = 5 cm ; b₃ = 13 cm

l = 16 cm ; b = 12 cm and h = 5 cm

Area = (12 + 5 + 13)*16 + (12*5)

= 30*16 + 60

= 480 + 60

= 540 cm²