Mary Quay Geometry crossword

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Across
  1. 2. describes shapes that have the same ratio no matter what size they are
  2. 4. a line from the side of the circle to the middle
  3. 6. equals double the radius of a circle
  4. 9. rise over run
  5. 10. a three sided polygon
  6. 11. point in the middle of a segment
  7. 13. half of a sphere
  8. 15. a multi sided figure
  9. 16. opposite
  10. 18. a shape with many points that are equidistant
  11. 19. a polygon with 2 pairs of congruent sides
  12. 20. half shape with many points that are equidistant
Down
  1. 1. area of all the sides of a shape combined
  2. 3. a shape that has two equal sides
  3. 5. for a triangle- A=1/2Bh
  4. 7. amount of space a shape takes up
  5. 8. lines that form a right angle
  6. 12. if a shape has sides that are mirror images of each other
  7. 14. lines on a coordinate plane that will never intersect
  8. 17. 2:3