Geometry

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Across
  1. 1. Triangle with two equal sides
  2. 5. Has no width and length
  3. 7. Point that bisects the segment
  4. 8. Two angles whose sum is 90 degrees
  5. 11. Points that lie on the same plane
  6. 14. Polygon with four sides
  7. 15. Closed figure with straight sides
  8. 17. Four-sided polygon that is both equilateral and equiangular
  9. 19. Its length is infinite
  10. 20. Means “angle”
Down
  1. 2. Two angles whose sum is 180 degrees
  2. 3. Non-coplanar lines that never meet
  3. 4. Line that connects two non-consecutive side of a polygon
  4. 6. Supplementary angles that are also adjacent
  5. 9. Polygon with equal sides and equal angles
  6. 10. Polygon with nine sides
  7. 12. Four-sided polygon whose sides are all equal
  8. 13. With one endpoint and the other has no end
  9. 16. Triangle with three acute angles
  10. 18. Angle that measures exactly 90 degrees