Geometry Vocabulary

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Across
  1. 2. line segment from its center to its perimeter
  2. 4. greater than 90 degrees
  3. 6. a polygon with 3 edges and 3 verticles
  4. 8. proportion of a circles circumference lying between 2 points
  5. 9. a figure formed by 2 rays
  6. 10. the region inside a circle lying between 3 radii of the cicle
  7. 12. any flat surface on a 3-dimensional figure
  8. 15. the longest side of a right triangle
  9. 16. perimeter of a circle
  10. 17. all sides and angles are congruent
  11. 18. the outline or boundary of an object
Down
  1. 1. a quadrilateral with the reflection of symmetry across a diagonal
  2. 3. less than 90 degrees
  3. 5. a shape consisting of all points in a plane that are at a given distance from a given point, the center
  4. 7. a straight one-dimensional figure with an infinite length
  5. 9. the amount of space of a 2-dimensional shape
  6. 11. 2 figures or objects that are the same shape and size
  7. 13. line segment that has both endpoints on the circumference
  8. 14. a quadrilateral with 4 right angles
  9. 17. a quadrilateral with 2 pairs of parallel sides