Given the diagram below, what is mA?

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asked Oct 25, 2019 130k views

2 Answers

Zlumer · Answer 1 · 2019-10-28T21:39:42+0000

For a polygon of n sides, the sum of the measures of the interior angles is 180(n - 2).

This polygon has 4 sides, so the sum of the measures of the interior angles is

180 * (4 - 2) = 180 * 2 = 360

m<A + 110 + 110 + 70 = 360

m<A + 290 = 360

m<A = 70

Given the diagram below, what is mA?

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