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To solve a 30-60-90 triangle, you need to know the length of one side.
The hypotenuse is twice as long as the shortest leg (the side opposite the 30 angle)
The longer leg (opposite the 60 angle) is the length of the shorter leg times the square root of 3.
So in summary:
If you know the hypotenuse, divide it by 2 to find the shorter leg, and multiply that times the square root of 3 to find the longer leg.
If you know the longer leg, divide it by the square root of 3 to find the shorter leg, then multiply that by 2 to find the hypotenuse.
If you know the shorter leg, multiply it by 2 to find the hypotenuse. Multiply the shorter leg length by the square root of 3 to find the longer leg.
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