| A | B |
|---|
| angle | A shape formed by two rays that share an endpoint |
| intersecting lines | Lines that meet or cross |
| line segment | A part of a line that includes two points, called endpoints, and all of the points between them |
| parallel lines | Lines in the same plane that never cross and are always the same distance apart |
| endpoint | The point at either end of a line segment |
| line | A straight path extending in both directions with no endpoints |
| octagon | A polygon with eight sides and eight angles |
| pentagon | A polygon with five sides and five angles |
| perpendicular lines | Lines that intersect to form right angles |
| quadrilateral | A polygon with four sides and four angles |
| rhombus | A quadrilateral with two pairs of parallel sides and four sides of equal length |
| Venn diagram | A diagram that shows relationships among sets of things |
| polygon | A closed plane shape with straight sides that are line |
| ray | A part of a line, with one endpoint, that is straight and continues in one direction |
| trapezoid | A quadrilateral with at least one pair of parallel sides |
| vertex | The point at which two rays of an angle or two (or more) line segments meet in a plane shape or where three or more edges meet in a solid shape |
