Dua lingkaran dengan jari-jari masing-masing adalah 7 cm , 21 cm. Perbandingan keliling nya adalah.
Jawaban Terkonfirmasi
Penyelesaian :
Keliling lingkaran 1 :
K = 2 × π × r
K = 2 × ²²/7 × 7 cm
K = 44 cm
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Keliling lingkaran 2 :
K = 2 × π × r
K = 2 × ²²/7 × 21 cm
K = 132 cm
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Perbandingan :
= K1 : K2
= 44 : 132
= 1 : 3
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Jawaban:
1 : 3
Penjelasan dengan langkah-langkah:
K1/K2
= 2 × pi × r1 × 2 × pi × r2
Coret 2 × pi
= r1/r2
= 7 cm/21 cm
= 7/21
= 1/3