Mathematics Crossword Challenge 2021 (Puzzle 2)

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Across
  1. 6. a parallelogram whose 4 sides are the same length
  2. 7. 7-sided polygon
  3. 9. list of numbers in a special order
  4. 12. distance from the center of a circle to its edge
  5. 13. relationship between two lines which meet at a right angle
  6. 14. comparison of two quantities
  7. 15. increase or decrease in size
Down
  1. 1. type of angle that more than 90 degree
  2. 2. number that is multiplied by variable
  3. 3. part of right angle triangle
  4. 4. type of trigonometric
  5. 5. a figure with 4 sides
  6. 8. add the numbers in a set then divide by the number of numbers in the set
  7. 10. number that tell how many times being multiplied
  8. 11. other name for square root