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Module 1: Angle types

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Complementary and supplementary angles

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XSIQ
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Geometry - Complementary and supplementary angles

Complementary and supplementary angles

Sometimes we group angles in pairs where they add up to either a right
angle or a straight angle. If two angles together form a right angle, they
are called complementary angles. [1] If they form a straight angle, they
are called supplementary angles. [2]

Click here for a quiz on complementary and supplementary angles.

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Links:
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[1] http://alison.com/#
[2] http://alison.com/#