Answer:
25.1cm
Step-by-step explanation:
since circumference =d and d=2r
c=(2*4)
c=8
c=25.132741229
c=25.1cm
90.8
cercumference=πD
r=2×D
C=90.8
im reallly sorry
so it is simple all you need to do is
is that u in the pic?