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First of all, it is obviously a right triangle. Suppose the shortest leg (the one with the 60 and 90 degree angle) is xunits long. Then the other leg is x times (the square root of 3). The hypotenuse is just twice the length of the first leg (2x). With this triangle you are able to find the side lengths and the angles without using trigonometry.

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Q: Describe the special properties of a 30-60-90 triangle?
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