Respuesta :

nicolagrant513

Answer:

d=2r

C=2πr

A=πr2

Step-by-step explanation:

that's the answers

dawitbrhane438

Answer:

if r=10ft then diameter will be 20ft and circumference=4πr, c=4*3.14*10ft= 125.6ft &area= πr^2=3.14*100=314ft.