Mu Alpha Theta 10/18 - if the answer is multiple words, there are no spaces

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Across
  1. 2. 3.14159
  2. 5. first outside inside last
  3. 7. 2 lines that form a 90 degree angle
  4. 9. opposite/hypotenuse
  5. 11. top part of a fraction
  6. 13. formula sqrt [(x2-x1)^2+(y2-y1)^2]
  7. 15. the type of congruent angles that are opposite one another at the intersection of 2 lines
  8. 18. another word for average
  9. 19. slope of the curve
  10. 21. rule f’g+fg’
  11. 22. all positive and negative whole numbers
Down
  1. 1. side of a right triangle that is opposite the right angle
  2. 3. largest integer that divides evenly into a given set of numbers (abbreviation)
  3. 4. the point halfway between 2 points
  4. 6. point a point where the derivative is either 0 or undefined
  5. 8. another way to say Integral
  6. 10. a septagon has __________ sides (spell the number out)
  7. 12. flat surface that extends up to infinity
  8. 14. the name of this form of an equation: Y – mx + b
  9. 16. where 2 lines meet
  10. 17. distance around the outside of a circle
  11. 20. the type of triangle with all interior angles less than 90 degrees