polygons crossword

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Across
  1. 3. The line segments that make up a polygon.
  2. 5. The external form of an object.
  3. 6. Lines that never meet.
  4. 8. A three-sided polygon.
Down
  1. 1. Having the same value or amount.
  2. 2. The branch of mathematics dealing with shapes and sizes.
  3. 4. A polygon with all sides and angles equal.
  4. 6. A closed figure with straight sides.
  5. 7. Formed by two rays that share a common endpoint.