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3 years ago

What is the surface area of the triangular prism?

Mathematics

1 answer:

Anna71 [15]3 years ago

6 0

Answer:

72 ft²

Step-by-step explanation:

Calculate the area of each face and then sum them.

area of base = 4 × 5 = 20 ft²

area of back = 5 × 3 = 15 ft²

area of sloping face = 5 × 5 = 25 ft²

area of 2 triangular faces = 2 × $\frac{1}{2}$ × 4 × 3 = 4 × 3 = 12 ft²

Thus

surface area = 20 + 15 + 25 + 12 = 72 ft²

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Step-by-step explanation:

Please have a look at the attached figure.

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