| Term | Definition |
|---|
| polygon | straight sides |
| not polygons | curve |
| triangle (TRI) | 3 sides (Remember: bike with 3 wheels) |
| quadrilateral (QUAD) | 4 sides (Remember:4 coins) |
| pentagon (PENT) | 5 sides (Remember:FBI in famous building) |
| hexagon (HEX) | 6 sides (Remember:spell 6 siX) |
| octagon (OCT) | 8 sides (Remember:animal with 8 legs) |
| decagon (DEC) | 10 sides (Remember:the months) |
| width | short side |
| height | measure how tall |
| base | bottom side |
| side | line on the outside |
| right angle | 90º (Like a corner) |
| area | flat, how many squares cover |
| angle | 2 lines meet at a corner |
| perimeter | add the sides, the distance around |
| distance | how far a line is (measure with a ruler |
| parallel | lines that can't cross |
| trapezoid | quadrilateral: 2 sides parallel, 2 sides NOT parallel |
| parallelogram | quadrilateral: all sides parallel |
| rectangle | parallelogram, right angles |
| rhombus | parallelogram: same sides |
| square | parallelogram: right angles AND same sides |
| acute angle | less than 90º (Small) |
| obtuse angle | more than 90º (Large) |
| congruent | equal, the same measure |
| nonagon | 9 sides (Remember: 9 Nine) |
| heptagon | 7 sides |
| curve | rounded (like a circle) |
| intersect | lines that cross (like X) |
| open | sides don't meet (come together) |
Combine with other sets
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