MATH!!!!!

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Across
  1. 2. when 2 or more lines
  2. 7. when you are finding the slop you can add or subtract 2 problems which is called
  3. 8. like a chair!
Down
  1. 1. the outside of the shape
  2. 3. how much space is inside a shape
  3. 4. the base of all linear equations
  4. 5. When 2 lines will never meet
  5. 6. 3.14