Geometry

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Across
  1. 2. Straight line that passes through the center of a circle
  2. 3. Angle that measures 180 degrees
  3. 7. Closed, 2D shape with at least 3 straight sides
  4. 8. A triangle with all equal sides
  5. 12. Closed shape with ONLY 4 sides
  6. 13. A triangle with only 2 equal sides
Down
  1. 1. polygon with TWO PAIRS if parallel sides
  2. 4. Tool used for measuring angles
  3. 5. Angle that measures 1 to 89 degrees
  4. 6. A straight line from the center of a circle to the circumference
  5. 9. Triangle with no equal sides
  6. 10. Straight line that connects two points on a circle
  7. 11. Angle that measures 91 to 179 degrees