MATH

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Across
  1. 3. intersection making a 90 degrees angle
  2. 6. (x1-x20)^2 + (y2-y1)^2 squarerooted
  3. 9. polygon A= 1/2Pa
  4. 10. distance from the center of the triangle to the midpoint of a side
  5. 12. angle less than 90 degrees
  6. 13. figure formed by two rays and is connected at an endpoint
  7. 15. a line segment joining a vertex
  8. 16. if and only if statement
  9. 19. statement that's true but not fully proven
  10. 20. 90 degree angles
Down
  1. 1. two objects being the same shape
  2. 2. A=1/2(d1 X d2)
  3. 4. a^2 + b^2 = c^2
  4. 5. a line with a single endpoint
  5. 7. A=S^2
  6. 8. two angles with a common vertex
  7. 11. 3 bisectors in an interior triangle intersect
  8. 14. (x1+x2/2), (y1+y2/2)
  9. 17. an operation that undoes a question
  10. 18. A=bh