maths

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Across
  1. 4. 3^(4)÷3^(2)
  2. 5. My area is calculated by product of my length and breadth.
Down
  1. 1. I am an odd number. Take away one letter and I become even. What number am I?
  2. 2. sum of all my angles is 180.
  3. 3. I have no sides