Question

Consider a triangular prism. The triangular end has a base of 3 cm and height of 5 cm. The length of each side is 7 cm and the height of the prism (length of the rectangle) is 12 cm. What is the surface area of this triangular prism?

Answer 1

SA= bh+(s1+s2+s3)H
SA=3(5) + (3 + 7 + 7)(12)=219

The answer is 219cm2