Geometry Crossword Puzzle

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Across
  1. 3. Lines that intersect to form a right angle
  2. 6. 4-sided figure with opposite sides parallel and equal in length
  3. 7. Shape with five sides
  4. 9. Shape with six sides
  5. 12. - The name of any 4-sided shape
  6. 14. - Bottom of a triangle or parallelogram
  7. 15. Lines that NEVER intersect
  8. 17. A 90 degree angle
  9. 18. A shape with two pairs of parallel sides (not a rectangle)
Down
  1. 1. - Shape with 4 equal sides
  2. 2. Distance around a shape
  3. 4. - The mathematical term for a shapeBase
  4. 5. A quadrilateral with one pair of parallel sides
  5. 8. The vertical measure used in area formulas
  6. 10. A point where two sides of a polygon meet
  7. 11. The distance across a circle passing through its center
  8. 13. The amount of space inside a 2D shape
  9. 16. A straight edge of a polygon