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Verified answer
Diketahui :- Jari - Jari = 7 cm
- Sudut = 60°
Ditanya :
A. Luas Lingkaran = ....?
B. Keliling Lingkaran = ....?
Penyelesaian :
A. Luas Lingkaran :
L = 60°/360° × π × r × r
L = 1/6 × 22/7 × 7 × 7
L = 1/6 × 22 × 7
L = 1/6 × 154
L = 25⅔ cm²
B. Keliling Lingkaran :
K = 60°/360° × 2 × π × r
K = 1/6 × 2 × 22/7 × 7
K = 1/3 × 22
K = 7⅓ cm
Maaf Kalau Salah
luas : a×t dibagi 2.
alas :7 t: √7²-3,5² = √49-12.25 = √36.75 =6.06
6.02×7 dibagi 2 = 21.07
semoga membantu. maaf kalo jawabannya salah ya..