Jari-jari = 15 cm
b. Diameter = 40 cm
K = ….
c.
Jari-jari = 28 cm
K =
d. Diameter = 42 m
K
= ….
e.
Jari-jari = 100 cm
A.
jawaban:
a. 2×π×r
2×3,14×15
=31,40cm
b. π×d
3,14×40
=125,6cm
c. 2×π×r
2×22/7×28
=88cm
d. π×d
22/7×42
924/7 =132cm
e. 2×π×r
2×3,14×100
628,00