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MathMentor

Learn with Mentor · 6 min

Perimeter of Polygons

Find the perimeter of polygons by adding every listed side length once, including shapes with many sides and repeated side lengths.

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What are we learning?

Perimeter is the total distance around the outside of a polygon. In these Year 8 questions, the shape may have 3, 4, 5, 6, 7 or 8 listed sides, so the main skill is careful accounting: every side is included once.