basic needs of words- math

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Across
  1. 2. same algorithm different number
  2. 4. y= mx+b
  3. 7. 6 sided figure
  4. 8. equal
Down
  1. 1. 90 degree angle
  2. 3. each angular point of a shape
  3. 5. how much is in this shape
  4. 6. standard of measurement