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Problem 176

Geometry Difficulty 1.2 Multiple choice CEMC Gauss (Grade 7) · Canada · 2015

The perimeter of the figure shown is

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Official solution

The length of the side not labelled is equal to the sum of the two horizontal lengths that are labelled, or $2+3=5$ . Thus, the perimeter of the figure shown is $5+5+2+3+3+2=20$ .

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Source: CEMC, University of Waterloo, licensed CC-BY-NC-4.0. Statement reproduced verbatim; metadata (topic, difficulty, ordering) added by this project.