Mathematics Crossword Puzzle

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Across
  1. 1. An enclosed figure on a plane bounded by at least 3 or more straight sides
  2. 5. The middle value when numbers are arrange in order
  3. 7. A triangle with all sides and angles are equal
  4. 10. The longest side of a right-angled triangle
  5. 11. The measure of space enclosed within the boundary of 2D shape
  6. 12. A straight line from the centre of the circle to any point on the circumference
Down
  1. 1. The result of multiplying numbers together
  2. 2. Perimeter of a circle
  3. 3. The longest chord in a circle
  4. 4. An angle more than 90 but less than 180
  5. 6. Whole numbers that can divide the number completely
  6. 8. An angle more than 0 but less than 90
  7. 9. A polygon with four sides