Question

Use 3.14 to estimate the unknown measures for each circle

C=132in
d=?
r=?
A=?

Answer 1

This how I did it,
So d= 42.04( round up)
R=21.01(round up)
A=1386(round up)

Answer 2

π = 3.14

C = πd
132 = πd
d = C ÷ π
d = 132 ÷ 3.14
132 ÷ 3.14 = 42.03821656050955
d = 42.03821656050955 / 42.04 to 2dp

r = d ÷ 2
r = 42.03821656050955 ÷ 2 = 21.01910828025478 / 21.02 to 2dp

A = r * r
A = 21.01910828025478 * 21.01910828025478 = 441.8029128971 / 441.80 to 2dp

d = 42.04 to 2dp
r = 21.02 to 2dp
A = 441.80 to 2dp