Geometry Crossword

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Across
  1. 1. Divide into 2 equal parts
  2. 5. distance around a flat object
  3. 6. number of square units needed to fill a flat surface
  4. 9. four right angles and equal sides
  5. 10. Halfway point on a line segment
  6. 12. 2rπ
  7. 14. pizza slice of a circle
  8. 15. 4 congruent sides
  9. 16. angle in a circle with its vertex on a circle
  10. 17. Proof that lists statements/reasons in order
  11. 18. rigid transformation that involved sliding a figure to a new location
  12. 20. soak a toe a
Down
  1. 2. = 180 degrees
  2. 3. 2 pairs of adjacent congruent sides
  3. 4. flipping a figure over a line
  4. 7. amount each side a figure is multiplied by when its proportionally changed in size
  5. 8. = 90 degrees
  6. 11. transformation that multiplies shape by factor
  7. 13. line segment with both endpoints on a circle
  8. 19. set of points with a fixed distance from the center