Geometry

3. An angle that equals 360° (a full circle); also revolution
7. An angle greater than 90° but less than 180°
8. A triangle that has one of its angles equal to 90° and a small square to represent it
10. Quadrilateral in which two pairs of adjacent sides are equal in length and one pair of opposite angles are equal
11. Angles that add to 90°
14. A triangle with all sides equal in length and all equal angles
15. quadrilateral Quadrilateral that does not have any special properties
16. A parallelogram in which all sides are equal and opposite angles are equal
17. An angle greater than 0° but less than 90°
18. An angle that equals 90°
20. Quadrilateral in which one pair of opposite sides is parallel

1. Quadrilateral with both pairs of opposite sides parallel to each other
2. Angles add to 180°
4. A triangle that has two sides of equal length and two opposite angles that are also equal
5. Parallelogram in which all sides are equal and all angles are equal to 90°
6. A triangle that has no equal sides and the angles are unequal
8. Parallelogram in which the opposite sides are equal in length and all angles are equal to 90°
9. An angle greater than 180° but less than 360°
12. An angle that equals 180°
13. 2-dimensional closed shape formed by four straight lines
19. 2-dimensional, closed shape formed by three straight lines