These angles share these properties, making them unique angles and important ones to learn when working with applications and problems involving angles and algebra. The two supplementary angles, if joined together, form a straight line and a straight angle. Similarly, complementary angles add up to 90 degrees. For example, the angles 140 and 40 are supplementary since adding them. Both angles are called supplementary to each others. Geometric Definition of Supplementary: Two angles are supplementary if, when placed adjacent to each other with one side in common, their non-common sides form a straight line. A 30° and A 150°, so A and A are supplementary angles. A linear pair forms a straight angle which contains 180, so you have 2 angles whose. Answer (1 of 3): Two angles are supplementary. (geometry) plural of supplementary angle Let angle A 30° and angle B 10°, so that their supplementary angles are A 150° and B 170°, respectively.··(geometry) A pair of angles that sum to 180 degrees. These angles may share a common side, a common vertex, or have no points in common. For example, angle 130 and angle 50 are supplementary angles because sum of 130 and 50 is equal to 180. Supplementary angles are a pair of angles, which when added measure 180 degrees. When the sum of two angles is equal to 180o, then they are called supplementary angles. If two angles form a linear pair, the angles are supplementary. In geometry, two angles whose measures sum to 180 degrees are supplementary angles.
Congruent supplementary angles are angles that meet two conditions - they are congruent and they are supplementary. Supplementary angles are those angles that sum up to 180 degrees.
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