Exam vocab
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Created by:
sullivanmath on May 14, 2012
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Description:
Geometry terms to know for the 2012 exam
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20 terms
Terms | Definitions |
|---|---|
 collinear points | two or more points that lie on the same line |
| coplanar | lying in the same plane |
| radius | a line segment joining any point on a circle or sphere to the center |
| chord | a segment that joins two points on a circle |
| diameter | a chord that contains the center of a circle or a sphere |
| acute angle | an angle with measure between 0 and 90 degrees |
| obtuse angle | an angle with measure between 90 and 180 degrees |
| right angle | angle with measure 90 degrees |
| adjacent angles | two angles with a common side and a common vertex, but with no common points in their interiors |
| perpendicular lines | two lines that intersect to form four right angles |
| complementary angles | two angles whose measures have a sum of 90 degrees |
| supplementary angles | two angles whose measures have a sum of 180 degrees |
| vertical angles | the angles opposite each other when two lines intersect to form four angles |
| acute triangle | a triangle with three acute angles |
| right triangle | a triangle with a right angle |
| obtuse triangle | a triangle that has one obtuse angle |
| scalene triangle | a triangle with no two sides congruent |
| isosceles triangle | a triangle with at least two sides congruent |
| equilateral triangle | a triangle in which all sides are congruent |
| regular polygon | a polygon in which all sides are congruent and all angles are congruent |
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