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Geometry II

Mrs. P's geometry terms part II

AngleA figure formed by two rays starting from the same endpoint.
VertexThe common endpoint of two rays.
ProtractorAn instrument used to measure an angle.
Congruent anglesAngles that have the same measurement.
Perpendicular linesTwo lines that intersect to form 90 degree angles.
Right angleA 90 degree angle.
Acute angleAn angle that measures between 0 and 90 degrees.
Obtuse angleAn angle that measures between 90 and 180 degrees.
Complementary angles Two angles whose sum is 90 degrees.
Supplementary anglesTwo angles whose sum is 180 degrees.

Sandra Shencavitz

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