Question

calcule a circunferência quando π=3,14.
o raio mede 6 cm
raio mede 7 cm
diâmetro mede 15 cm
2 diâmetro mede 30 cm

Answer 1

.............

R=6.....cm
0,06•2=0,12cm

D=12cm
C=3,14•0,12=0,3768•100=37,68cm
A=3,14•R^2=3,14•0,0144=0,0452➡ pí144 cm2

R=7....cm
0,07•2=0,14cm
C=3,14•0,14=0,4396•100=43,96cm
A=3,14•0,0196=0,061544=
PÍ196 CM2

D=15....cm
R=15/2=7,5cm
C=3,14•0.15=0,471=47,61cm
A=3,14•0,0225=0,07065cm2
➡ pí225 cm2

D=30.....cm
Ra=30/2=15 cm
C=3,14•0,30=0,942•100=94,20cm
A=3,14•0,09=0,2826cm2➡ Pí900 cm2