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29 December, 08:57

The measure of two angles of a triangle are 31 and 128 degrees. Find the measure of the third angle.

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  1. 29 December, 11:54
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    21°

    Step-by-step explanation:

    All angles in a triangle add up to 180°.

    180 - 31 - 128

    = 21

    The measure of the third angle is 21°.
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