MATHHHHHH!

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Across
  1. 5. when two things are the same
  2. 7. line drawn through the center of a circle touching both ends
  3. 9. to make larger
  4. 10. three dimensional shape with a circular bottom and a point at the top
  5. 11. two or more terms that have the same variables
  6. 14. equation that shows mathmatical relationship
  7. 16. two or more straight lines that will never intersect
  8. 17. distance around a flat object
  9. 19. perimeter around a circle
  10. 21. the average
Down
  1. 1. number of times something occurs\
  2. 2. the middle number in a ordered set of numbers
  3. 3. unit for measuring angles
  4. 4. the set of numbers
  5. 6. set of numbers showing point on a graph
  6. 8. two number lines that meet at the origin (0,0)
  7. 12. when the values increase also can be shown on graph with a triangle
  8. 13. parrallel to the horizon
  9. 15. sum of numbers added together and divided by number or entries
  10. 18. a flat surface of a polyhedron
  11. 20. when a shape has the same size and angles