Circles

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Across
  1. 1. a line that passes through the center and whose endpoints lie on the circumference
  2. 5. a line segment whose endpoints lie exactly on the circle's circumference
  3. 9. created using 3 perpendicular bisectors of a triangle
  4. 11. the "pie-slice" part of a circle
  5. 13. half the measure of a central angle that defines the same arc
  6. 15. a quadrilateral which is circumscribed in a circle
Down
  1. 2. a curved line segment on the circumference of a circle
  2. 3. 2πr
  3. 4. created using 3 angle bisectors of a triangle
  4. 6. a way to measure an angle instead of using degrees
  5. 7. πr^2
  6. 8. a perpendicular line that intersects the circle at exactly one point
  7. 10. angles in a circle measured from the center point, vertex is on the center
  8. 12. 3.14
  9. 14. half the length of a diameter