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Surface area of a triangular prism

This math skill teaches how to calculate the surface area of a triangular prism by flattening it into a net, computing the area of each face (two triangles and three rectangles), and then summing these areas.

Learn surface area of a triangular prism

Teaching Transcript

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What is the surface area of this triangular prism?

First we flatten the three dimensional shape into a net and see we have two triangles and three rectangles

For each shape, we can calculate the area

Add them together, we have a total surface area of 84

Skill Practice

Surface area of a triangular prism

Test your understanding of surface area of a triangular prism by practicing it! Work through the below exercises to use it in practice.