Question

First try was incorrectA triangular prism can be unfolded into the net shown below. Find thetotal surface area of the triangular prism.5 mm2.1 mm4.5 mm15.2 mm

Answer 1

ANSWER:

The total surface area of the triangular prism is 69.77 square millimeters

STEP-BY-STEP EXPLANATION:

We have that the formula surface area of the remaining prism is the following

$SA=b\cdot h+L\cdot(s_1+s_2+s_3)$

Replacing:

s1, s2 and s3 are the sides of the triangle, the base and the height are of the triangle and L is the length of the rectangle.

$\begin{gathered} SA=2.1\cdot4.5+5.2\cdot(5+2.1+4.5) \\ SA=9.45+60.32 \\ SA=69.77 \end{gathered}$