| Term | Definition |
|---|
| Regular | all sides, angles, congruent |
| Polygon | shape or figure, straight lines, closed shape |
| Parallel | never touch, distance apart |
| Perpendicular | will always form a right angle |
| Ray | a line with one end-point |
| Line segment | part of a line with two end-points |
| Line | goes on and on in each direction |
| Point | exact place in space |
| Intersecting | line that will always cross over each other |
| Midpoint | half-way between a line |
| Quadralateral | a four-sided polygon |
| Hexagon | a six-sided polygon |
| Heptagon | a seven-sided polygon |
| Octagon | an eight-sided polygon |
| Pentagon | a five-sided polygon |
| Supplementary | straight angle = 180 degrees |
| Complementary | right angle = 90 degrees |
| Protractor | a tool used to measure angles |
| Congruent | equal; all the same |
| Vertices | plural of vertex |
| Vertex | where two rays or line-segments meet |
| Degree | mark used to measure angle |
| Degrees | mark used to measure angles |
| Straight Angle | exactly 180 degrees |
| Right Angle | exactly 90 degrees |
| Obtuse | 91 to 179 degrees |
| Acute | 1 to 89 degrees |
Combine with other sets
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