Question

Using the net below, find the surface area of the triangular prism.

Answer 1

Answer:
118 cm²

Explanation:

Area of rectangle = l x b
= 7 x 5 = 35cm²
=4 x 7 = 28cm²
Add the area of the three rectangles = 35+35+28
=98cm²
Area of triangle = 1/2 x b x h
= 1/2 x 4 x 5
= 10 + 10 = 20
Therefore, area of the prism = 118cm²

Answer 2

Hi, there! The total surface area of that prism is 118 cm^2.

Explanation:

The three rectangles on the side are called the lateral area, and they add up to 98(I'm assuming you know how to find the area of a 2d shape), and as for the triangles on the sides, you can just use the formula which is
`b*h/2`.

Hope this helps :)