In a trapezoid, three interior angles measure 80°, 100°, and 140°. What is the measure of the fourth interior angle.

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asked Oct 28, 2017 26.3k views

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Timothee · Answer 1 · 2017-11-03T04:05:44+0000

All four-sided figures' interior angles will always add up to 360*. Therefore, the final angle is 40*, found by adding up all the values you have and subtracting them from 360.

In a trapezoid, three interior angles measure 80°, 100°, and 140°. What is the measure of the fourth interior angle.

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