Question 254296
I will set it up for you.
d=2r
7=2r
7/2=r
3.5=r
A=pi*r^2
A=22/7*(7/2)^2
A=(22/7)*(7*7/(2*2)
A=(22*7*7)/(7*2*2)
I think you can see some cancelling to do
At least 2/2 and 7/7 which is why I chose 22/7 rather than 3.14 for pi and left the radius as 7/2