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22 August, 05:52

Given a triangle with a = 12, A = 13°, and B = 12°, what is the length of c? Round to the nearest tenth.

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  1. 22 August, 07:32
    0
    =5.1 units

    Step-by-step explanation:

    To use the sine rule to find the length of c we first need to find the angle at C.

    C=180 - (13+12)

    C=180-25

    C=155°

    a/Sin A=c/Sin C

    Calculating for the value of c using the sine rule:

    12/Sin 13=c/Sin 155

    c=12 sin 155

    =5.07 units

    Thus to 1 decimal places, the value of c is 5.1 units.
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