12-4=8 which means 12-8=4 which means now you have the difference of 4 and 8+4=12 which means now you have the sum of 12
Answer:
12in is you answer
Step-by-step explanation:
The formula to find circumference is 
so to rearrange to solve for radius that will be 
=
=11.94in
I think this is it, but i’m not sure about the last one
Since it's isosceles, ∠ABC = (180-30) / 2 = 75