Geometry Crossword Puzzle

1234567891011121314151617181920
Across
  1. 5. Points that lie on the same line.
  2. 7. Two angles whose sum is 90 degrees.
  3. 8. a^2 + b^2 = c^2.
  4. 10. Points that lie on the same plane.
  5. 14. Lines that are parallel to each other.
  6. 16. An arc whose measure is greater than a semi-circle (180 degrees).
  7. 17. Has a vertex and a circular base.
  8. 18. Two angles whose sum is 180 degrees.
  9. 20. It is represented by a dot and named by a capital letter.
Down
  1. 1. The distance around a circle.
  2. 2. Mathematics that deals with points, lines, planes, and solids and examines their properties.
  3. 3. A prism where all sides are squares.
  4. 4. Is an angle measuring between 0 degrees and 90 degrees.
  5. 6. Angle whose measure is greater than 90 degrees, but less than 180.
  6. 9. For an acute angle in a right triangle, it's the ratio of the opposite side to the hypotenuse.
  7. 11. Two lines that intersect to form right angles.
  8. 12. A set of all points.
  9. 13. Is an angle whose measure is 90 degrees.
  10. 15. line in the plane of the circle that intersects the circle in one point
  11. 19. all sides are congruent and all four right angles.