If the approximate height of this right prism with triangular bases is 3.5 centimeters, what is its approximate surface area?

74 (square) cm

Step-by-step explanation:

First, to find the surface area of both faces, make each face into two right triangles.

Use the formula A = ab/2 to find the surface area of one of the new right triangles. in this case, A = 2x3.5/2 is equal to 3.5.

Double this to find the full surface area for each face, 7 (square) cm.

Next, find the surface area of the base by multiplying the length by the width. in this case, 4x5 = 20, your base surface area.

Next, find the surface areas of the sides the same way as the base. This example has the same measurements as well. 5x4 = 20.

Last, add all of the solutions together to get the surface are of the whole object. 7 + 7 + 20 + 20 + 20 = 74 (square) cm