Math Chapter 9 Vocab

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Across
  1. 2. the circumference to the diameter that is the same for every circle
  2. 4. figure is made up of triangles, squares, rectangles, semicircles, and other two-dimenstional figures
  3. 5. a point in the middle of a circle
  4. 6. angles two angles that are opposite angles formed by the intersection of two lines
  5. 9. the distance from the center to any point on the circle
  6. 11. one-half of a circle
  7. 12. angles two angles when they share a common side and have the same vertex
Down
  1. 1. the distance around a circle
  2. 3. angles two angles when the sum of their measures is 180 degrees
  3. 7. angles two angles when the sum of their measures is 90 degrees
  4. 8. the distance across the circle through the center
  5. 10. the set of all points in a plane that are the same distance from the center