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IGHS Winkels
Geometry Chapter 2 Vocabulary
Term | Definition |
---|---|
angle | a geometric figure formed by two rays with a common endpoint |
protractor | a tool used to measure angles |
acute angle | an angle that is greater than 0 and less than 90 |
right angle | an angle that is equal to 90 |
obtuse angle | an angle that is greater than 90 and less than 180 |
straight angle | an angle that is equal to 180 |
adjacent angles | two angles that have a common vertex and a common ray |
complementary angles | a pair of angles whose measures have a sum of 90 |
supplementary angles | a pair of angles whose measures have a sum of 180 |
congruent angles | angles that have the same measure |
vertical angles | angles formed by intersecting lines |
angle bisector | a ray that divides an angle into two congruent angles |