In planar geometry, an angle is the figure formed by two rays, called the sides of the angle, sharing a common endpoint, called the vertex of the angle. Angles formed by two rays lie in a plane, but this plane does not have to be a Euclidean plane.
https://en.wikipedia.org/wiki/Supplementary_angles
Angle is also used to designate the measure of an angle or of a rotation. This measure is the ratio of the length of a circular arc to its radius. In the case of a geometric angle, the arc is centered at the vertex and delimited by the sides. In the case of a rotation, the arc is centered at the center of the rotation and delimited by any other point and its image by the rotation.
https://en.wikipedia.org/wiki/Supplementary_angles
Angles with a sum of 180 degrees. Supplementary angles are angles whose sum is 180 degrees. An example would be two angles that are 50 and 130. Their sum is 180 degrees, and they form a straight like when put together.
https://socratic.org/questions/what-are-supplementary-angles
Two concepts that are related but not the same are supplementary angles and complementary angles. The difference is their sum. Supplementary angles are two angles whose measures sum to a 180 degrees and complementary are the sum have to add up to 90 degrees.
https://www.brightstorm.com/math/geometry/geometry-building-blocks/supplementary-and-complementary-angles/
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https://www.merriam-webster.com/dictionary/supplementary%20angle
either of two angles that added together produce an angle of 180°. Compare complementary angle. It may be noted that ∠P2CP1, being made up of halves of two supplementary angles, is a right angle. supplementary angle.
http://www.dictionary.com/browse/supplementary--angles
Complementary or Supplementary Angles. Two angles are complementary if the sum of their angles equals 90o. If one angle is known, its complementary angle can be found by subtracting the measure of its angle from 90o.
http://www.aaamath.com/geo-comp-or-sup.htm
Here is a look at two of the relationships. Supplementary angles are two angles that have a sum of 180°. Complementary angles are two angles that have a sum of 90°. There is an easy way to try and remember these using the first letters of each word. The S in supplementary can be used to form the 8 in 180. The C in complementary can be used to form the 9 in 90.
http://www.softschools.com/math/geometry/topics/supplementary_and_complementary_angles/
Supplementary angles are two angles whose sum is 180 degrees while complementary angles are two angles whose sum is 90 degrees. Supplementary and complementary angles do not have to be adjacent (sharing a vertex and side, or next to), but they can be. angles sum right angle.
https://www.brightstorm.com/math/geometry/geometry-building-blocks/supplementary-and-complementary-angles/
Definition of supplementary angle. : one of two angles or arcs whose sum is 180° —usually used in plural.
https://www.merriam-webster.com/dictionary/supplementary%20angle
what is a supplementary angle
A supplementary angle is an angle whose sum is 180 degrees. Supplementary angles are angles whose sum is 180 degrees.