Geometry

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Across
  1. 3. 3-dimensional circle
  2. 4. Quadrilateral (4 sided figure) which has 1 pair of parallel sides
  3. 6. Two lines that are 90° to each other
  4. 8. Angle less than 90°
  5. 9. 3-dimensional rectangle
  6. 11. Quadrilateral which has 2 pair of parallel sides
Down
  1. 1. Triangle which has one angle=90°
  2. 2. 3-dimensional square
  3. 5. Two lines that are same distance apart and never touching
  4. 7. Triangle which has 3 equal sides; each angle = 60°
  5. 10. Triangle which has two equal sides
  6. 12. Angle more than 90°