| A | B |
|---|
| triangle | 3-sided polygon |
| quadrilateral | 4-sided polygon |
| pentagon | 5-sided polygon |
| hexagon | 6-sided polygon |
| heptagon | 7-sided polygon |
| octagon | 8-sided polygon |
| nonagon | 9-sided polygon |
| decagon | 10-sided polygon |
| dodecagon | 12-sided polygon |
| equiangular | polygon with all congruent angles |
| equilateral | polygon with all congruent sides |
| regular | polygon with congruent sides & angles |
| central angle | angle w/vertex @ center of polygon & sides to 2 consecutive vertices |
| 360 degrees | sum of all central angles of any REGULAR polygon |
| 360/n | formula to find measure of 1 central angle in regular polygon |
| 72 degrees | measure of 1 central angle in regular pentagon |
| 90 degrees | measure of 1 central angle in a square |
| 60 degrees | measure of 1 central angle in a regular hexagon |
| acute | triangle w/3 acute angles |
| right | triangle w/a right angle |
| obtuse | triangle w/1 obtuse angle |
| equilateral | triangle with 3 congruent sides |
| isosceles | triangle w/at least 2 congruent sides |
| scalene | triangle with NO congruent sides |
| trapezoid | quadrilateral w/only 1 pair of parallel sides |
| parallelogram | quadrilateral w/2 pairs of parallel sides |
| rhombus | a quadrilateral w/4 congruent sides |
| rectangle | a quadrilateral w/4 right angles |
| square | a quadrilateral w/4 congruent sides & 4 right angles |
| bisect | diagonals of a parallelogram do this to each other |
| supplementary | consecutive angles of a parallelogram are this |
| squares & rhombi | diagonals in these quadrilaterals are perpendicular |
| congruent | Opposite angles in a parallelogram are |
| congruent | Opposite sides in a parallelogram are |
| supplementary | Consecutive angles in a parallelogram are |
| bisect | Diagonals of a parallelogram * each other |
| 2 congruent triangles | Diagonals of a parallelogram divide it into |
| squares & rectangles | Quadrilaterals w/4 right angles |
| squares & rhombi | Quadrilaterals w/4 congruent sides |
| squares & rhombi | Diagonals bisect 2 angles in ? |
| square | I am a regular quadrilateral |
| rectangle, square | I am an equiangular quadrilateral |
| rhombus, square | I am an equilateral quadrilateral |
| true | T/F All squares are parallelograms, rectangles & rhombi. |
| false | T/F If a figure is a parallelogram, then it cannot be a rectangle. |
| true | T/F If a figure is a parallelogram, then it cannot be a trapezoid. |
| true | T/F If a figure is not a parallelogram, then it cannot be a square. |
| true | If a figure is a trapezoid, then it cannot be a rectangle. |
