Math Crossword

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Across
  1. 4. middle number
  2. 6. perimeter around a circle
  3. 7. corner of shapes
  4. 9. chance of something happening
  5. 11. angles that add up to 90
  6. 13. connected by a vertical
Down
  1. 1. What is inside a shape
  2. 2. The long side of a shape
  3. 3. The line all the way across a circle
  4. 5. Average
  5. 7. distance from zero
  6. 8. Equal fraction
  7. 10. The short side of a shape
  8. 12. 3.14