Flashcards: Geometry Terms
About these flashcards
Created by:
kegarza on February 9, 2010
Subjects:
Groups:
The Cool And Smart And Fiery And Epic And Awesome People, Challenge B Destin, Cotting 211, Math Lab
Log in to favorite or report as inappropriate.All 27 terms
Terms | Definitions |
|---|---|
 point | names a location |
| line | is perfectly straight and extends forever in both directions |
| plane | is a perfectly flat surface that extends forever in all directions |
| segment | is the part of a line between two points |
| ray | is part of a line that starts at one point and extends forever in one direction |
| angle | is formed by two rays with a common end-point called the vertex. |
| right angle | an angle that measures 90 degrees |
| acute angle | an angle that measures more than zero but less than 90 degrees |
| obtuse angle | an angle that measures more than 90 degrees, but less than 180 degrees |
| complementary angles | two angles whose measures add to 90 degrees |
| supplementary angles | two angles whose measures add up to 180 degrees |
| congruent figures | figures that have the same shape and same size |
| vertical angles | a pair of opposite congruent angles formed by intersecting lines |
| Triangle Sum Theorem | states that the measures of the angles in a triangle add up to 180 degrees |
| acute triangle | has 3 acute angles |
| right triangle | has one right angle |
| obtuse triangle | has one obtuse angle |
| equilateral triangle | has three congruent sides and angles |
| isosceles triangle | has at least two congruent sides and angles |
| scalene triangle | has NO congruent sides or angles |
| polygon | is a closed plane figure formed by three or more sides |
| regular polygon | a polygon with congruent sides and angles |
| trapezoid | a quadrilateral with exactly one pair of parallel sides |
| paralellogram | a quadrilateral that has 2 pairs of parallel sides |
| rectangle | a parallelogram with four right angles |
| rhombus | a parallelogram with all side congruent |
| square | a parallelogram with four right angles and four congruent sides |