Across
- 1. name of the symbol ( ∆)
- 4. who discovered zero
- 7. shape of the brick
- 9. Half of the radius
- 10. name of the polygon with 8 sides
- 11. who discovered infinity symbol ♾️
- 13. Half of the circle
- 15. all natural number's are whole numbers not all whole numbers are natural number's.true or false
- 16. theorem most famous theorem of triangle in geometry
- 19. smallest perfect number
- 20. mean of the numbers 4,8,6,12
Down
- 2. how many furlongs in a mile
- 3. full form of maths
- 5. father of mathematics
- 6. what is largest unit of volume
- 8. triangle that has sides of lenght 3,4,5.what type of traingle is it
- 12. angle greater than 180 degree but less than 360 degree
- 14. all negative numbers are less than what number
- 17. year's how many years are there in a decade
- 18. inches what is one half of single foot