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Kylealanhale · Answer 1 · 2018-11-06T23:57:50+0000

Yes, its true. The measures of an exterior angle and the adjacent interior angle add up to 180 degrees because they form a linear pair.

The sum of angles of a triangle are 180 and the pair of exterior and interior angle are supplementary angles. See the figure attached below:

The measures of an exterior angle and the adjacent interior angle add up to 180 degrees-example-1

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