Question

Which equation can be used to calculate the surface area of the triangular prism net show below?

Answer 1

This answer would always be 13

Answer 2

Answer: $A=10*13+10*12+10*5+2*\frac{5*12}{2}$

Step-by-step explanation:

The surface area would be the sum of all the separated areas shown in the figure.

$A1=10*13\\A2=10*12\\A3=10*5\\A4=\frac{5*12}{2}$

The equation for the total area:

$A=A1+A2+A3+2*A4\\A=10*13+10*12+10*5+2*\frac{5*12}{2} \\A=130+120+50+60\\A=360cm^{2}$