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You need to know something else to solve: either the long leg or the angle

edit: if it is a right triangle you can use a theorem to figure out the other sides.

the smallest side is a, the hypotenuse is 2a, the longer leg is a * sqrt (3)

if the hypotenuse is 20, the smaller leg is 10.

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Q: The length of the hypotenuse of a triangle is 20 what is the shorter leg?
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