Question

Find the surface area

Answer 1

210.6
`in^(2)`

Explanation:

Area of bottom triangle = bh/2 = 9(7.8)/2 = 35.1

Measure of 1 lateral face = 13(9)/2 = 58.5

Total measure of all 3 lateral faces = 3(58.5) = 175.5

Surface area = 35.1 + 175.5 = 210.6
`in^(2)`