3. Special Right Triangles
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Start by drawing a diagram to illustrate the situation.
B
We are told that a longer leg of a 30^(∘)-60^(∘)-90^(∘) triangle has a length of 5sqrt(3) and we want to find the length of its shorter leg. To do so, we will start by drawing a diagram to illustrate the situation. Let x be the length of the shorter leg of the triangle.
In a 30^(∘)-60^(∘)-90^(∘) triangle, the longer leg is sqrt(3) times the length of the shorter leg.
We found that the length of the shorter leg of the given triangle is 5, which corresponds to answer B.