tolong dibantu yahh :)!
Berapakah panjang lilitan dari 4 lingkaran yang berjari-jari 7 cm .
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dit : panjang 4 lilitan tali ?
jwb : panjang 4 lilitan tali = 4 x Keliling Lingkaran
= 4 x 2 x 22/7 x7
=176 cm
=4d+2 \pi r
=4.14+2.22per7 .7
=56+44
=100 cm