Question

What's the radius of a circle who's circumference is 135.648

Answer 1

Circumference=diamter times pi
diamter=2 times radius
circumference=radius times 2 times pi
circunference=135.648
aprox pi to 3.14
subsitute
135.648=radius times 2  times 3.14
135.648=radius times 6.28
divide both sides by 6.28
21.6=radius
aswe ris radous=21.6 units

Answer 2

So, you know the circumference is 135.648, since you are trying to find the radius. We know C=π*d

135.648=3.14*d
135.648/3.14=d

thus, your diameter is 43.2

but remember, diameter is r^2

so 43.2/2

your radius is 21.6