Chapter 9 Vocabulary

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Across
  1. 2. angles - opposite angles formed by the intersection of two lines
  2. 5. - one-half of a circle.
  3. 6. - the distance around a circle
  4. 8. angles -two angles when the sun of their measures is 180 degrees
  5. 9. - the distance from the center to any point on the circle
  6. 11. - the middle of a circle
  7. 12. - the set of all points in a plane that are the same distance from a point called the center
  8. 13. - the extent or measurement of a surface or piece of land
Down
  1. 1. angles - two angles when they share a common side and the same vertex
  2. 3. angles - two angles when the sun of their measures is 90 degrees
  3. 4. - the distance across the circle through the center
  4. 7. - made up of triangles, squares, rectangles, semicircles, and other 2D figures.
  5. 10. - the continuous line forming the boundary of a closed geometric figure