Math Madness!

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Across
  1. 2. 2 sides of a triangle with equal length
  2. 4. 2 shapes with the smae angles and the corresponding sides are
  3. 5. the curve in a circle
  4. 9. highest/ lowest values of a specific set of numbers
  5. 10. the line from the center of a circle
  6. 12. a^2 + b^2 = c^2
  7. 14. 90º
  8. 15. a 2 dimensional shape with 4 sides and 4 right angles
  9. 16. a mathematical equation with variables and constants
  10. 17. round base that narrows to a point
  11. 18. a way to compare two quantities, showing how much of one quantity there is in relation to another
Down
  1. 1. 4 sides, all sides equal length
  2. 3. a monumental structure with a square or triangular base and sloping sides that meet in a point at the top
  3. 6. joining 2 points on any curve
  4. 7. angle of 90º on a surface
  5. 8. halfway point of a line
  6. 11. 3 dimensional shape that is round
  7. 12. a shape with opposite sides with equal length
  8. 13. goes on forever