MATH

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Across
  1. 2. Rigth angle
  2. 5. Multiply length X width
  3. 6. Less than 180 degrees,morethan 90 degrees
  4. 8. 180 degrees
  5. 9. Equation with unknown
  6. 10. Altogether
Down
  1. 1. Addition of all sides
  2. 3. Shape with 4 equal sides
  3. 4. Operation we use to compare.
  4. 7. Makes my life easier