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27 March, 08:10

Given ΔABC, m∠A = 120°, b = 13 cm, and c = 15 cm. Find the triangle's area. Round to the nearest tenth.

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  1. E
    27 March, 09:08
    0
    Refer to the diagram shown below.

    m∠A = 120°

    b = 13 cm

    c = 15 cm

    From the Law of Sines, the area of the triangle is

    Area = (1/2) * b*c*sin (A)

    = 0.5*13*15*sin (120°)

    = 84.4375 cm²

    Answer: 84.4 cm² (nearest tenth)
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