Tyler's Geometry Dictionary
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Angles
A shape, formed by two lines or rays diverging from a common point (the vertex).
Acute angles
Acute angles are the smallest angles, being between (but not including) zero and 90°.
Obtuse angle
An
angle
whose measure is greater than 90° and less than 180°.
Right angle
An
angle
whose measure is exactly 90°.
Straight angle
An
angle
whose measure is exactly 180° - a straight line.
Reflex angle
An
angle
whose measure is greater than 180° and less than 360°.
Complementary Angles
Two angles that add up to 90°.
Supplementary angles
Two angles that add up to 180°.
Adjacent angles
Two
angles
that share a common side and a common
vertex
, but do not overlap.
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