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5 August, 10:21

N ΔABC, if the length of sides a, b, and c are 3.5 centimeters, 5.5 centimeters, and 6 centimeters respectively, what is m∠C to two decimal places?

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  1. 5 August, 11:16
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    We are given with three sides with measurements such as below:

    a = 3.5 cm

    b = 5.5 cm

    c = 6 cm

    We are asked to solve for m∠C. To solve this we need to apply Law of Cosines such as below:

    cos C = a²+b² - c² / 2ab

    cos C = 3.5² + 5.5² - 6² / (2*3.5*5.5)

    cos C = 0.16883

    C = 80.28°
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