Angles that add to 180 degrees are called supplementary angles, while angles that add to 90 degrees are called complentary angles.
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180 degrees
Two angles whose sum is 180 degrees are called supplementary angles. When two angles are supplementary, it means that the sum of their measures equals 180 degrees. This relationship is often used in geometry to solve for unknown angles or to identify complementary angles.
supplementary angles
Yes, there are four angles. And the sum of its angles is 180 degrees.
No, the angles in a quadrilateral add up to 360 degrees. The angles in a triangle add up to 180 degrees.