These cards will help you memorize your geometry dictionary.
Terms : Hide Images
| 130171620 | Square | 4 equal sides. 90 degree angles. | |
| 130171621 | Rectangle | quadrilateral. 90 degree angles. | |
| 130171622 | Quadrilateral | 4-sided polygon |  |
| 130171623 | Perimeter | distance around a figure |  |
| 130171624 | Area | number of square units it takes to cover a figure |  |
| 130171625 | Base | bottom of a figure |  |
| 130171626 | Height | the line that makes a 90 degree angle with the base |  |
| 130171627 | Right Angle | 90 degree angle |  |
| 130171628 | Triangle | 3-sided polygon |  |
| 130171629 | Acute Triangle | 3-sided polygon, each angle is less than 90 degrees |  |
| 130171630 | Obtuse triangle | 3-sided polygon, 1 angle greater than 90 degrees |  |
| 130171631 | Right Triangle | 3-sided polygon. One 90 degree angle. |  |
| 130171632 | Isosceles Triangle | 3-sided polygon. 2 congruent sides. |  |
| 130171633 | Equilateral Triangle | 3-sided polygon. 3 congruent sides. 3 60 degree angles. |  |
| 130171634 | Scalene Triangle | 3-sided polygon. No congruent sides |  |
| 130171635 | Leg | the 2 sides that make the right angle in a right triangle |  |
| 130171636 | Hypotenuse | side opposite the right angle in a right triangle |  |
| 130171637 | hypotenuse | side opposite the right angle in a right triangle | |
| 130171638 | parallelogram | 4-sided quadrilateral. 2 pairs of parallel lines |  |
| 130171639 | parallel lines | lines that will never intersect |  |
| 130171640 | trapezoid | 4-sided quadrilateral. 1 pair of parallel lines |  |
| 130171641 | congruent | same size, same shape |  |
| 130171642 | rhombus | 4 equal-sided polygon |  |
| 130171643 | segment | line between two points |  |
| 130171644 | vertex or vericies | the point where 2 lines meet |  |
| 130171645 | polygon | many-sided figure, closed, straight line segment | |
| 130171646 | regular polygon | polygon with congruent sides and congruent angles |  |
| 130171647 | irregular polygon | polygon without all congruent sides |  |
| 130171648 | straight angle | angle measuring 180 degrees |  |
| 130171649 | circle | infinite set of points equidistant from a centerpoint |  |
| 130171650 | radius | half the diameter |  |
| 130171651 | diameter | distance across a circle through the center point |  |
| 130171652 | pi | ratio of circumference of a circle to its diameter, irrational; = 3.14 |  |
| 130171653 | circumference | distance around a circle |  |
| 130171654 | semi-circle | half of a circle |  |
| 130171655 | inscribed | a figure drawn inside another |  |
| 130171656 | circumscribed | a figure drawn within a circle |  |
| 130171657 | complementary angles | angles whose sum equals 90 degrees |  |
| 130171658 | Supplementary angles | angles whose sum equals 180 degrees |  |
| 130171659 | interior angle | angles inside of a polygon |  |
| 130171660 | exterior angle | angle made when you extend one of the sides of the polygon outside from the polygon |  |
| 130171661 | regular polygon | a polygon with congruent sides and congruent angles | |
| 130171662 | pentagon | 5-sided polygon |  |
| 130171663 | hexagon | 6-sided polygon |  |
| 130171664 | heptagon | 7-sided polygon |  |
| 130171665 | octagon | 8-sided polygon |  |
| 130171666 | nonagon | 9-sided polygon |  |
