A right triangle has one side that measures 4 in. The angle opposite that side measures 80o.What is the length of the hypotenuse of the triangle? Round to the nearest tenth.

Use the sine ratio: sin(80°) = opposite ÷ hypotenuse. Since the opposite side is 4 in., the hypotenuse is 4 ÷ sin(80°) ≈ 4.06 in. Rounded to the nearest tenth, that is 4.1 in., choice B.

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