| A | B |
|---|
| point | an exact location in space, represented by a dot |
| ray | par of a line that starts with an endpoint and continues endlessly in one direction |
| line segment | a part of a line; has two endpoints |
| line | a straight, continuous and unending |
| parallel lines | lines that do not intersect are always the same distance apart |
| intersecting lines | lines that cross |
| perpendicular lines | lines that meet or cross (intersect) forming right angles |
| acute angle | 1-89 degrees |
| obtuse angle | great than 90 degrees |
| right angle | exaclty 90 degrees |
| vertex | the middle point where the two sides of an angle meet |
| right triangle | a triangle that has one 90 degree angle |
| scalene triangle | a triangle that has no sides the same (congruent) |
| isosceles triangle | a triangle with two congruent (same) sides |
| pentagon | a polygon with 5 sides |
| hexagon | a polygon with 6 sides |
| heptagon | a polygon with 7 sides |
| octagon | a polygon with 8 sides |
| quadrilateral | a polygon with 4 sides |
| triangle | a polygon with 3 sides |
