Geometry Crossword Puzzle

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Across
  1. 2. All 4 sides are equal.
  2. 3. straight.
  3. 5. 2 rays meet at a common point.
  4. 9. A 90-degree angle.
  5. 11. An angle greater than 90.
  6. 13. Opposite of another operation.
  7. 15. A quadrilateral with 2 pairs of equal-length sides.
  8. 17. C=2πr.
  9. 18. An angle smaller than 90 degrees.
  10. 19. opposite sides are parallel.
  11. 21. The center point of the shape.
Down
  1. 1. proves an equation false.
  2. 4. Switches hypothesis and conclusion.
  3. 6. Has 6 sides.
  4. 7. 2 triangles with the same size and shape.
  5. 8. The amount of space taken up by a 2d shape.
  6. 10. A line that bisects an angle.
  7. 12. The middle value in a list ordered from smallest to largest.
  8. 14. The distance around the edge of a shape.
  9. 16. A shape with 8 sides.
  10. 20. A point in the exact middle of a line.