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We don't know whether the 15cm happens to be the hypotenuse (longest side)

of the right triangle. It makes a big difference.

-- If the 15cm is the longest side, then the third side is 7.483 cm. (rounded)

-- If the 13cm and the 15cm are the "legs", then the hypotenuse is 19.849 cm. (rounded)

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Q: What is the missing length of the right triangle which measures 15 cm by 13 cm?
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