Geometry Vocabulary

3. a quadrilateral with 4 equal sides; opposite sides are equal in length and parallel
7. a quadrilateral with 4 right angles; both sets of opposite sides are equal in length and parallel
10. a triangle that has three acute angles
12. an angle that measures greater than 90 degrees but less than 180 degrees
13. a geometric shape formed when two rays share the same endpoint
15. lines that meet or cross each other to form right angles
18. a part of a line between two endpoints
19. lines that are always the same distance apart and never meet
20. a four sided figure
23. the fold line indicating that a figure's two halves match exactly

1. a triangle with one right angle
2. a quadrilateral with exactly one pair of parallel sides
4. a triangle with one obtuse angle
5. a quadrilateral with opposite sides equal in length and parallel; opposite angles have the same size
6. an exact location represented by a dot
8. the unit used to measure an angle
9. lines that meet or cross each other
11. the point at the beginning of a ray or a line segment
14. a quadrilateral with 4 right angles and 4 equal sides; opposite sides are equal in length and parallel
16. an angle with a measure of 90 degrees
17. a straight set of points that extend forever in opposite directions
21. an angle with a measure that is greater than 0 degrees and less than 90 degrees
22. a part of a line that has one endpoint and goes on forever in one direction without ending