The Vocabulary of Geometry

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Across
  1. 3. a line used to make or mark measurements.
  2. 4. a closed 2 dimensional polygon with 6 sides.
  3. 6. polygon with 8 sides and 8 angles.
  4. 9. two lines that never intersect.
  5. 10. the common endpoint at an angle (where the sides intersect).
  6. 11. a segment with endpoints on the circle.
  7. 12. a location with no size shape or dimension.
  8. 13. a point exactly in the middle of a line segment.
  9. 17. a line that intersects the circle in two places.
  10. 19. a two-dimensional shape with 4 sides and 4 angles.
  11. 21. a portion of the edge of the circle defined by two endpoints.
  12. 22. half the diameter of the circle.
Down
  1. 1. dividing a shape into two equal parts.
  2. 2. made up of points with no thickness or width.
  3. 5. a 9 sided polygon.
  4. 7. the distance around the outside of a circle.
  5. 8. two lines that intersect at a 90 degree angle.
  6. 14. the length of the line through the center that touches 2 points on the edge of the circle.
  7. 15. quadrilateral with 2 parallel sides and 2 non-parallel sides.
  8. 16. a triangle where all 3 sides are equal in length.
  9. 18. a line that extends indefinitely in one direction.
  10. 20. the intersection of two rays at an endpoint.