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Geometry
| Term | Definition |
|---|---|
| acute angle | less than 90 degrees |
| obtuse angle | more than 90 degrees |
| right angle | 90 degrees |
| parallel sides | 2 sides that are the same distance apart and never touch |
| congruent sides | sides of a shape that are the exact same length |
| congruent angles | angles that have equal measures in degrees |
| polygon | a 2-dimensional closed figure with three or more straight sides |
| regular polygon | A polygon that has ALL congruent sides and ALL congruent angles |
| irregular polygon | A polygon that does not have all congruent sides and all congruent angles |
| equilateral triangle | a triangle with 3 congruent sides |
| isosceles triangle | a triangle with 2 congruent sides |
| scalene triangle | a triangle that does not have any congruent sides |
| acute triangle | a triangle that has all acute angles |
| obtuse triangle | a triangle that has one obtuse angle and and 2 acute angles |
| right triangle | a triangle that has a 90 degree angle |
| quadrilateral | a polygon with 4 sides |
| square | a regular polygon that has 4 congruent sides and 4 right angles |
| rectangle | a quadrilateral that has 4 right angles |
| trapezoid | a quadrilateral that has eaxactly one set of parallel sides |
| parallelogram | a quadrilateral with two sets of parallel sides |
| kite | a quadrilateral with 2 adjacent congruent sides |
| rhombus | a quadrilateral with 4 congruent sides |
| pentagon | a polygon with 5 sides |
| hexagon | a polygon with 6 sides |
| heptagon | a polygon with 7 sides |
| octagon | a polygon with 8 sides |
| nonagon | a polygon with 9 sides |
| decagon | a polygon with 10 sides |
Created by:
user-1993346