geometry words

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Across
  1. 2. a shape with three or more sides
  2. 6. the middle of a circle
  3. 7. a shape with 2 sets of parallel sides, and all congruent angles
  4. 8. two angles, lines or shapes which are the same in length and size
  5. 11. a shape with 2 sets of congruent parallel sides, with no right angles
  6. 12. a triangle with no congruent sides or angles
  7. 13. the measurement around a circle
  8. 15. an angle less than 90°
  9. 17. a shape with two sets of congruent parallel lines
  10. 19. a line that goes across the center of a circle
  11. 20. a polygon with 7 sides
Down
  1. 1. a polygon with 9 sides
  2. 3. an angle more than 90°
  3. 4. a 90° angle
  4. 5. a polygon with 5 sides
  5. 9. a shape with three sides and three angles
  6. 10. a triangle with 2 congruent sides, and the angles across opposite the congruent sides are also congruent
  7. 14. a shape with 4 sides
  8. 16. a polygon with 10 sides
  9. 18. a segment of a circle