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2 September, 13:35

Two of the angles in a triangle measure 18° and 72°. What is the measure of the third angle?

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  1. 2 September, 16:13
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    Step-by-step explanation:

    the sum of angles in a triangle is 180 degrees

    18 + 72 + X = 180

    90 + X = 180

    X = 180 - 90

    X = 90
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