Find The Total Surface Area Of This Triangular Prism:

A triangular prism has three rectangular sides and two triangular faces. To find the area of the rectangular sides, use the formula A = lw, where A = area, l = length, and h = height. To find the area of the triangular faces, use the formula A = 1/2bh, where A = area, b = base, and h = height

Step-by-step explanation:

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A. 3 inches

Step-by-step explanation:

Formula: A = 1/2 b x h

Solution:

A = 1/2 bh

A = 1/2 (5 in.)(3 in.)

A = (2.5 in.)(3 in.)

A = 7.5

To check the value of h:

A = b x h

7.5 = 1/2 (5 in.) h

7.5 = 2.5 h

divide:

7.5/2.5 = 7.5 h/ 7.5

or: 7.5 ÷ 2.5 = 3 inches