Maths Puzzle

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Across
  1. 3. Number of degrees in a right angle
  2. 6. A fifth of forty
  3. 7. A shape with five sides
  4. 9. One quarter plus one quarter
  5. 10. Six times fifteen
Down
  1. 1. A triangle with no sides or angles the same
  2. 2. A shape with eight sides
  3. 4. Half of one hundred and forty
  4. 5. Direction that is opposite of south
  5. 8. Four times twenty