MJ Goemetry Puzzle

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Across
  1. 2. the equation of adjacent and hypotenuse sides
  2. 4. length or center of the circle
  3. 6. 3d object multiplied by L*W*H
  4. 9. the difference in size in the new and old object
  5. 10. the equation of opposite and adjacent sides
  6. 12. a shape with 5 sides and 5 angles
  7. 13. triangle will all sides
  8. 16. object with 4 sides
  9. 17. the length and width times together
  10. 19. line that has two end segments
  11. 20. lines that intersect
Down
  1. 1. all sides added together
  2. 3. multiply a number by itself
  3. 5. the space between two intersecting lines
  4. 7. shape with 3 sides
  5. 8. an eternal angle of 90 degrees
  6. 11. the equation of opposite hypotenuse sides
  7. 14. triangle with two sides and an angle
  8. 15. lines that don't intersect
  9. 18. number that is 3.14