Answer:

Step-by-step explanation:
Perimeter of semicircle = 
Where r = 11 cm
=> P = 
=> P = 
=> P = 56.55751919 cm
the sign would probably be a negative. imagine this - - - - - - and then + + +, cancel out the negatives and plus then you are left with more negatives than positive so the sign will take the negative sign.
<span>P - 3 1/6 = -2 1/2
3 1/6- 21/2
p=2/3 </span>
Answer:
1/4
Step-by-step explanation:

The answer is sampling convenience. I am super sure.