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    NationalMediumGeometry7–9

    In a right triangle the hypotenuse measures 2020 cm and one acute angle is 30°30°. What is the length of the side opposite that angle, in cm?

    Num triângulo retângulo a hipotenusa mede 2020 cm e um ângulo agudo é 30°30°. Qual é o comprimento do cateto oposto a esse ângulo, em cm?

    A right-angled triangle drawn to scale. The right angle is at C and the acute angle of 30 degrees is at B, at the far end of the hypotenuse of 20 cm. The side opposite that angle, from C up to A, is drawn thicker and marked with a question mark.30°?20 cmABC

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    Solution

    Step 1 of 3

    1. 1.sin⁡30°=oppositehypotenuse\sin 30° = \frac{\text{opposite}}{\text{hypotenuse}}