| A | B |
|---|
| polygon | flat, closed figure with line segments |
| triangle | 3 sides, 3 angles |
| quadrilateral | 4 sides, 4 angles |
| pentagon | 5 sides, 5 angles |
| rectangle | opposite sides are paralle, + 4 right angles |
| square | 4 sides same length, 4 right angles |
| trapezoid | one pair of paralle sides |
| parallelogram | opposite sides are parallel and same length |
| point | location in space |
| line segment | part of a laine with two endpoints |
| parallel lines | line that are equal distance apart |
| intersecting laines | lines that cross |
| perpendicular lines | form a right angle to each other |
| ray | part of a laine that has one endpoint and goes on without end |
| right angle | two rays that form a right angle |
| obtuse angle | greater than a right angle |
| sides | rays of an angle |
| vertex | common endpoint of an angle |
| acute angle | smaller than a right angle |
| degrees | units of measure in an angle |
