Geometry

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Across
  1. 2. the perimeter of a circle
  2. 3. an angle greater than 90 degrees
  3. 6. two angles that add up to 90 degrees
Down
  1. 1. an angle less than 90 degrees
  2. 4. a shape with three sides and 3 angles
  3. 5. two angles that add up to 180 degrees