Check the picture below.
you can pretty much count those lengths off the grid.
recall that A = 1/2 bh.
Answer:
4
Step-by-step explanation:
This formula only applies if the track is circular. If it is, then we write the equation:
2*r*pi=400
Dividing by 2pi, we see that:
r=200/pi
This is approximately 63.66.
The answer is 45 have a nice day