Algebra? Algebra!

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Across
  1. 3. all sides and angles are the same
  2. 4. line that crosses one of the axis's
  3. 7. Triangle all sides are the same
  4. 9. equation either is a constant or a product
  5. 12. ratio a decrease and increase between terms
  6. 13. portion of circumference of a circle
  7. 14. experssions that show if its greater or lesser or equal
  8. 15. figure made up of line segments that are connected from end to end
  9. 17. Line equation has an undefined slope
  10. 18. has four congruent sides
  11. 20. of Inequalities A collection of inequalities
Down
  1. 1. one pair of parallel sides
  2. 2. sides are parallel and don't touch
  3. 5. two expressions are equal
  4. 6. function is defined
  5. 8. line determines if the line is solid or dashed
  6. 10. contains four right angles
  7. 11. each input is related to one output
  8. 16. A point on a line segment that divides into two equal parts
  9. 19. of Equations A collection of equations