Question

Jess is building a skateboarding ramp in the shape of a triangular prism with the dimensions shown. If Jess wants to cover all faces of the ramp with plywood, how much plywood will he need?

96 square feet
144 square feet
156 square feet
168 square feet

Answer 1

C) 156

Explanation:

Answer 2

we know that
surface area of the triangular prism=2*area of the base+perimeter of base*height

area of the base=b*h/2
b=3 ft
h=4 ft
area of the base=3*4/2----> 6 ft²

perimeter of the base=3+4+5-----> 12 ft
height of the prism=12 ft

surface area of the triangular prism=2*6+12*12-----> 12+144---> 156 ft²

the answer is
156 ft²