Math Crossword Puzzle

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Across
  1. 6. Circumference
  2. 8. The measure of the interior space of a three-dimensional figure.
  3. 10. Start line on a coordinate plane
  4. 11. An input has only on output
  5. 13. Total inside of the shape
  6. 15. A two-dimensional pattern that can be folded to form a three-dimensional figure.
  7. 17. Top of Fraction
  8. 20. A number below zero
Down
  1. 1. Third Power
  2. 2. Polygons with four sides are called quadrilaterals. Different quadrilaterals are named for the relationships of angles and sides.
  3. 3. Bottom Face of a figure
  4. 4. The average
  5. 5. Vertical length
  6. 7. A number times its self
  7. 8. Letters in Equations
  8. 9. A number that has no fractions or
  9. 12. An angle that is larger than 90 degrees
  10. 14. An angle smaller than 90 degrees
  11. 16. The sum of the lengths of all of the sides of a polygon. The sides are measured in linear units such as feet, yards, or meters.
  12. 18. Second Power
  13. 19. How long a shape is