a. K= 44 cm
b. K = 132 cm
c. K = 125,6 cm (phi = 3,14)
d. K= 110 cm
e. K= 314 cm (phi = 3,14)
f. K = 880 cm
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2. Tentukan diameter dan jari-jari lingkaran, jika diketahui kelilingnya berikut!
JAWABAN :
A.)
K = π × D
44 = 22/7 × D
D = 44 : 22/7
D = 44 × 7/22
D = 14
Diameter = 14 cm
Jari-Jari = 7 cm
B.)
K = π × D
132 = 22/7 × D
D = 132 : 22/7
D = 132 × 7/22
D = 42
Diameter = 42 cm
Jari-Jari = 21 cm
C.)
K = π × D
125,6 = 3,14 × D
D = 125,6 : 3,14
D = 40
Diameter = 40 cm
Jari-Jari = 20 cm
D.)
K = π × D
110 = 22/7 × D
D = 110 : 22/7
D = 110 × 7/22
D = 35
Diameter = 35 cm
Jari-Jari = 17,45 cm
E.)
K = π × D
314 = 3,14 × D
D = 314 : 3,14
D = 100
Diameter = 100 cm
Jari-Jari = 50 cm
F.)
K = π × D
880 = 22/7 × D
D = 880 : 22/7
D = 880 × 7/22
D = 280
Diameter = 280 cm
Jari-Jari = 140 cm