Mathmania (crossword set -1)

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Across
  1. 4. length*breadth*height
  2. 5. x+x=60
  3. 8. A three termed polynomial
  4. 11. MATHEMATICAL CONCEPT DEALING WITH NUMBER OF POSSIBLE ARRANGEMENTS?
  5. 12. father of mathematics?
  6. 14. ANGLES WHOSE SUM IS 180
  7. 18. Having the EXACT same size and shape.
  8. 21. smallest whole number
  9. 22. mathematical theorem used to calculate the length of the sides of a right angled triangle on the basis of other two lengths
  10. 23. who discovered first infinite series problem
  11. 24. 2+3=8
Down
  1. 1. 16-4÷1/4 + 4
  2. 2. Another word for height
  3. 3. 56 times ¼
  4. 6. circles with common center
  5. 7. In a triangle it is the line segment drawn from a vertex to the midpoint
  6. 9. the number by which the dividend is being divided
  7. 10. .sum of the digits of the Ramanujan number?
  8. 13. Two numbers whose product is 1
  9. 15. Two lines that intersect to form four right angles.
  10. 16. who invented zero
  11. 17. A polygon with seven sides and seven angles.
  12. 19. ratio of sine and cosine
  13. 20. Reciprocal of sine
  14. 23. four times multiplied by the length of the side of the polygon is the perimeter of the polygon known as