Geometry

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Across
  1. 2. an angle that is less than 90 degrees
  2. 5. a three-dimensional circle
  3. 6. a shape with three sides
  4. 8. the distance around a two-dimensional shape
  5. 9. a flat shape with four equal sides
Down
  1. 1. A shape with 8 sides
  2. 3. a pattern of shapes that don't overlap or have any gaps
  3. 4. the name of a round shape
  4. 7. an angle that is more than 90 degrees but less than 180 degrees
  5. 8. name of a three-dimensional triangle