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Geometry - 1-2
Angles, angle pairs, circles
Term | Definition |
---|---|
acute angle | an angle whose measure is greater that 0 degrees and less than 90 degrees |
right angle | an angle whose measure is 90 degrees |
obtuse angle | an angle whose measure is greater that 90 degrees and less than 180 degrees |
straight angle | an angle whose measure is 180 degrees |
complementary angles | two angles whose measures have a sum of 90 degrees |
supplementary angles | two angles whose measures have a sum of 180 degrees |
adjacent angles | coplanar angles that share a vertex and side but no interior points |
diameter | a chord containing the center of a circle or sphere or the length of such a chord |
radius | a line segment connecting the center of a circle with a point on the circle, or the length of such a segment |
chord | a segment whose endpoints are points of a circle or points of a sphere |
concentric circles | circles that share the same center |