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15 October, 08:29

I'm doing easy math but i don't remember learning this so heres the question.

One angle of a triangle is 20 degrees. The second angle's measurement is four times the third. Whats is the measure of the third angle?

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  1. 15 October, 11:16
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    Total measure is 180

    x is 2nd and y is 3rd angle

    2nd is 4 times 3rd angle

    x=4y

    total is 180

    20+x+y=180

    x=4y

    20+4y+y=180

    20+5y=180

    minus 20 both sides

    5y=160

    divide by 5

    y=32

    third angle is 32 degrees
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