The Law Of Cosine

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