geometry vocabulary

1. A straight line extending from the center of a circle or sphere to the circumference or surface.
3. line segments Line segments that do not intersect.
7. An equilateral parallelogram having oblique angles.
10. A closed plane curve consisting of all points at a given distance from a point within it called the center.
13. angle A 90 degree angle.
14. triangle A triangle having three unequal sides and angles.
16. A quadrilateral plane figure having two parallel and two nonparallel sides.
17. A polygon with four sides.(Note: squares, rectangles and trapezoids are also quadrilaterals.)
20. line segments Line segments that cross each other.

2. A rectangle having all four sides of equal length.
4. triangle A triangle with all sides equal and all angles equal.
5. The intersection point of two sides of a plane figure.
6. angle An angle less than 90 degrees but greater than 0 degrees.
8. A polygon having eight angles and eight sides.
9. A position in space.
11. A quadrilateral having both pairs of opposite sides parallel to each other.(Note: squares and rectangles are also quadrilaterals.)
12. A polygon with 5 sides and 5 angles.
15. A parallelogram having four right angles.(Note: a square is also a rectangle.)
18. The part of a straight line considered as originating at a point on the line and as extending in one direction from that point.
19. segment One part of a line.line A continuous extent of length.
21. The line segment between two points on a given curve.