Math crossword

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Across
  1. 2. The Continuous line forming around a figure
  2. 6. Theorem Fundamental relation among three sides of a triangle
  3. 7. Part of a whole
  4. 8. Part of a number, after the decimal point
  5. 9. The largest number in a group subtracted by the smallest number in a group
  6. 11. Putting something into groups
  7. 13. Same shape same size
  8. 15. number The number zero
  9. 17. Mathematics of generalized arithmetical operations
  10. 19. Pure mathematics of points,lines,curves,and surfaces
  11. 20. A line that passes through the center
Down
  1. 1. A shape with three congruent sides
  2. 3. The process or skill of multiplying
  3. 4. A math sentence using equal signs
  4. 5. Part of a number in a divisional form
  5. 10. The distance around a circle
  6. 12. Money expressed as a rate percent per year
  7. 14. The product of three equal terms
  8. 16. Answer to a math problem
  9. 18. the Surface of a two dimensional figure