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supplementary angle
NOUN [MATHEMATICS.]
1.
either of two angles that added together produce an angle of 180°.
Source: Dictionary.com
supplementary angle | Define supplementary angle at Dictionary.com
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www.mathsisfun.com/geometry/supplementary-angles.html

Supplementary Angles. Two Angles are Supplementary when they add up to 180 degrees. supplementary angles 40 and 140. These two angles (140° and 40°) ...

www.khanacademy.org/math/basic-geo/basic-geo-angle/vert-comp-supp-angles/a/complementary-and-supplementary-angles-review

Review the basics of complementary and supplementary angles, and try some practice problems.

www.khanacademy.org/math/basic-geo/basic-geo-angle/vert-comp-supp-angles/v/complementary-and-supplementary-angles

Learn about complementary and supplementary angles, as well as the definitions of adjacent and straight angles.

www.khanacademy.org/math/basic-geo/basic-geo-angle/vert-comp-supp-angles/e/complementary_and_supplementary_angles

Use your knowledge about complementary and supplementary angles to find missing angles.

www.khanacademy.org/math/geometry/hs-geo-foundations/hs-geo-angles/v/example-using-algebra-to-find-measure-of-supplementary-angles

Given the algebraic expressions that represent a pair of supplementary angles, Sal forms and solves an equation.

www.khanacademy.org/math/basic-geo/basic-geo-angle/vert-comp-supp-angles/e/identifying-supplementary-complementary-vertical

Practice telling whether two angles are supplementary, complementary, or vertical.

www.varsitytutors.com/hotmath/hotmath_help/topics/supplementary-angles

Supplementary angles are two angles whose measures add up to 180 degrees.

www.softschools.com/math/geometry/topics/supplementary_and_complementary_angles

There are many special relationships that can be formed using angles. Here is a look at two of the relationships. Supplementary angles are two angles that have ...

www.mathopenref.com/anglesupplementary.html

Definition and properties of supplementary angles - two angles that add to 180 degrees.