Across
- 3. Any triangle that is not a right triangle.
- 4. A triangle in which one angle measures 90 degrees.
- 5. Having a common boundary or edge.
- 8. Any of the four areas into which a plane is divided.
- 10. A triangle in which one angle measures more than 90 degrees.
- 12. the inverse function of the cosine.
- 13. The side of a right triangle opposite the right angle.
Down
- 1. The ratio of the circumference to the diameter of a circle.
- 2. A mathematical relation associating elements between sets.
- 6. A measure for arcs and angles.
- 7. The space between two lines or planes that intersect.
- 9. A triangle in which all angles measure less than 90 degrees.
- 11. c^2=a^2+b^2−2ab cosC