circle review2 （Alice）

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Across
  1. 2. a polygon having six sides.
  2. 3. a polygon having 12 angles and 12 sides.
  3. 10. a rectangle having all four sides of equal length.
  4. 12. triangle that the sides are same length
  5. 13. a closed plane figure having three sides and three angles.
  6. 15. triangle that the two sides are same length
  7. 16. a triangle which vertexes are on the circumference of the circle.
  8. 17. a polygon having ten angles and ten sides.
  9. 18. a perpendicular from the center of a regular polygon to one of its sides.
Down
  1. 1. a polygon having five angles and five sides.
  2. 4. a circle that passes through all the vertices of the polygon.
  3. 5. an n-sided polygon in which the sides are all the same length and are symmetrically placed about a common center
  4. 6. a figure formed by four straight lines that have six points of intersection;a polygon with four sides.
  5. 7. a polygon having ten angles and ten sides.
  6. 8. a polygon having seven angles and seven sides.
  7. 9. the center of an inscribed circle; that point where the bisectors of the angles of a triangle or of a regular polygon intersect.
  8. 11. the center of mass
  9. 14. a polygon having nine angles and nine sides.