Nomor 2 jawabannya A? Tolong

Panjang Busur S
= 30/360 x π x 10 x 2
= 1/12 x 20π
= 20/12π
= 5/3π cm { A }

Panjang busur S = sudut/360° x keliling lingkaran
= 30/360 x 2πr
= 1/12 . 2π (10)
= (20/12) π
= (5/3) π