Question

Besar sudut pusat AOB=60° dan panjang OB=14cm .luas Jurong AOB adalah
a.77cm
B.102‚67
C.2196
D.1.617
Mengunakan rumus

Answer 1

Verified answer

Mapel : Matematika
Materi : Lingkaran
Kelas : 8
==================

AOB = 60°
OB = 14 cm → Jari Jari Lingkaran = r

Ditanya Luas Juring

Penyelesaian :
__________

Luas Juring AOB
= (AOB/360) x Luas Lingkaran

= (60/360) x π x r²

= (1/6) x 22/7 x 14²

= (1/6) x 22/7 x 196

= (1/6) x 616

= 616/6

= 102,67 cm² → Opsi B

Answer 2

Verified answer

AOB = 60°
OB = 14 cm ⬅️⬅️Jari - jari

Luas Juring AOB ⬇️⬇️⬇️
= (Bsr sdt AOB/360°) × L. Lingkaran
= 60°/360° × phi r²
= 1 / 6 × 22 / 7 × 14 × 14
= 1 / 6 × 22 × 2 × 14
= 616 / 6
= 102,67 cm² ✔️

Semoga bermanfaat.....
-Prisco