Question

Calcule o diametro da circunferencia, de acoedo com o comprimento dado ( considere Pi = 3,14 ):
a ) 34,54 cm
b ) 50,24 cm
c) 4,71 m
d ) 28,26 m

Answer 1

C = 2πr

a)

34,54 = 2 . 3,14 . r

r = 34,54/6,28

r = 5,5

D = 2r

D = 2.5,5

D = 11cm

b)

50,24 = 2 . 3,14 . r

r = 50,24/6,28

r = 8

D = 2r

D = 2.8

D = 16

c)

4,71 = 2 . 3,14 . r

r = 4,71/6,28

r = 0,75

D = 2r

D = 2 . 0,75

D = 1,5

d)

28,26 = 2 . 3,14 . r

r = 28,26/6,28

r = 4,5

D = 2r

D = 2.4,5

D = 9