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= r1 : r2 = 2 : 1 = 6 : 3
r2 = 3r3
= r2 : r3 = 3 : 1
Maka Perb. Ke-3 Jari - Jari Adalah
= r1 : r2 : r3
6 : 3 : 1
A.) Perb. L. Lingkaran
= L1 : L2 : L3
= πr1² : πr2² : πr3²
( π Dipotong / DiHilangkan )
= 6² : 3² : 1²
= 6 : 3 : 1
B.) Perb. K. Lingkaran
= K1 : K2 : K3
= 2πr1 : 2πr2 : 2πr3
( 2π Dipotong / Dihilangkan )
= 6 : 3 : 1
Terima Kasih.
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