PLEASE HELP WITH MY MATH

i really need help with my math. it's an internet thing so anyone who's "not going to help me cheat" -_- dont worry thats not what it is. i need to know the area of 10 reuleaux triangles.

1. diameter = 9.4 ft
2. diameter = 22.5
3. diameter = 13
4. diameter = 8.2
5 diameter = 12
6. diameter = 7
7. diameter = 7.5
8. diameter = 10
9. diameter = 9
10. diameter = 11

thank you so much. the formula is supposedly: 0.5 (3.14 - square rt. of 3) diameter squared

Find the area of 10 reuleaux triangles.
The formula is supposedly:
0.5 (3.14 - sqrt 3) s^2
= 0.5(1.409549192)s^2
= 0.704774596*s^2

1).
diameter = 9.4 ft
Area = 62.27 sq. ft.

2).
diameter = 22.5
Area = 356.79

3).
diameter = 13
Area = 119.11

4).
diameter = 8.2
Area = 47.389

5).
diameter = 12
Area = 101.49

6).
diameter = 7
Area = 34.53

7).
diameter = 7.5
Area = 39.64

8).
diameter = 10
Area = 70.477

9).
diameter = 9
Area = 57.087

10).
diameter = 11
Area = 85.28