Plane Geometry

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Across
  1. 2. longest distance within a circle and crossed the center point
  2. 3. area of a circle
  3. 5. lines that never cross
  4. 6. cubic units
  5. 7. one degree is π/180
  6. 8. right, supplementary, complementary
  7. 9. same length or degree
Down
  1. 1. shapes that are proportional
  2. 4. includes triangles and quadrilaterals
  3. 5. distance around a polygon