Mathmatical Crossword

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Across
  1. 3. a shape with all equal size
  2. 6. The space between 2 intersecting lines
  3. 7. First double digit number
  4. 9. times numbers together
Down
  1. 1. The total size of something
  2. 2. Take away number
  3. 4. Shapes that combine to leave no gaps
  4. 5. How tall something is
  5. 8. A unit of measurement