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Pythagorean theorem: find the hypotenuse
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Learn it In a right triangle, $a^2 + b^2 = c^2$, where c is the hypotenuse (the longest side, opposite the right angle).
Example: Find the hypotenuse.
- $c^2 = 9^2 + 12^2 = 81 + 144 = 225$.
- $c = \sqrt{225} = 15$.
- The hypotenuse is 15 cm.
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