Math crossword

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Across
  1. 2. Point where all the perpendicular bisectors of a triangle meet
  2. 4. A visual description of the difference between 2 measurements
  3. 7. A mathimatical statement containing two mathmatical expression the values
  4. 8. When a number is Multiplyed by itself
  5. 9. The money borrowed by a person
  6. 10. an algebraic expression) consisting of three terms
  7. 15. what formula is "a^2 - b^2"
  8. 16. Numbers that are non repapatative and non terminating
  9. 18. Something that used to describe the quantity of a measurement, calculation or a body
  10. 20. A representation of number between 2 whole numbers
Down
  1. 1. The side opposite to a 90° angle in a triangle
  2. 2. Two objects are ________ if they have the same shape and size
  3. 3. The opposite of Expansion
  4. 5. A _______ of a number can be divided by the number without any remainder
  5. 6. What is P "{(1 + r/100)^2 - 1}" equal to
  6. 11. A symlbol that shows an operation
  7. 12. Number of types of triangles on the basis of angles
  8. 13. A polygon with three edges and three vertices.
  9. 14. a mathematical relationship or rule expressed in symbols
  10. 17. The process of replacing a variable with an equal number
  11. 19. _______ helps in the representation of problems or situations as mathematical expressions