Panjang busur PQ jika jari-jari 20cm dan sudut busur PQR 72°

Mapel : Matematika

Kelas : 8

Bab : Lingkaran
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Panjang busur PQ :

= (a / 360) x Keliling Lingkaran

= (72/360) x 2 x 3,14 x 20

= (1/5) x 125,6

= 125,6/5

= 25,12 cm ✔

Sudut PQS= 72°/360° x 2 x 3,14x 20
Sudut PQS= 1/5 x 2x3,14x20= 25,12 cm