No 2 tolong dijawab Pakai caranyaaa

keliling total
= keliling 1/2 lingkaran besar + 2 x keliling 1/2 lingkaran kecil
= 1/2 x 2πr + 2 x 1/2 x 2πr
= 4π + 2π2
= 4π + 4π
=8π

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