| A | B |
|---|
| line | a straight path that goes in two directions without end |
| line segment | a straight path that has 2 endpoints |
| ray | has one endpoint and goes on without end in one direction |
| intersecting lines | 2 lines that meet or cross at a common point |
| parallel lines | 2 lines that will never cross |
| diameter | a line touching 2 points on a circle and passing through the center of the circle |
| radius | a line from the center of a circle to a point on the circle |
| congruent shapes | two shapes that are exactly the same |
| line of symmetry | a line on which a figure can be folded so that both sides match |
| square | a closed 4 sided figure with 4 equal sides and 4 right angles |
| pentagon | a closed 5 sided figure |
| hexagon | a closed 6 sided figure |
| rectangle | a closed 4 sided figure with 4 right angles and opposite sides are equal |
| rhombus | a closed 4 sided figure where all four sides are the same length (diamond shape) |
| right angle | exactly 90% angle |
| less than a right angle | less then 90% angle |
| greater than a right angle | more than 90% angle |
