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A square has an area of 144$\text{cm 2}$. The side length of the square is

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A $\text{288 cm}$ B $\text{72 cm}$ C $\text{48 cm}$ D $\text{12 cm}$ E $\text{36 cm}$

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Official solution

The side length of a square having an area of 144 cm$^2$ is $\sqrt{144}$ cm or 12 cm.

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