Across
- 1. A triangle with three unequal sides and angles
- 5. The sum of two angles equals 180 degrees
- 9. A triangle with all sides and angles equal
- 10. An angle less than 90 degrees but greater than 0 degrees
- 11. An angle greater than 90 degrees but less than 180 degrees
- 12. A straight line extending from the center of a circle or sphere to the circumference or surface
Down
- 2. The sum of two angles equals 90 degrees
- 3. A equilateral parallelogram having oblique angles
- 4. A triangle that has two equal sides
- 6. A quadrilateral having both pairs of opposite sides parallel to each other
- 7. A straight line passing through the center of a circle or sphere and meeting the circumference or surface at each end
- 8. A parallelogram that has four right angles
