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- Jari - Jari = 3,5 cm
- Tinggi = 12 cm
- π = 22/7
Ditanya : Luas Permukaan Kerucut = ....?
Penyelesaian :
- Garis Pelukis :
s = √r² + t²
s = √3,5² + 12²
s = √12,25 + 144
s = √156,25
s = 12,5 cm
- Luas Permukaan Kerucut :
L = π × r × (r + s)
L = 22/7 × 3,5 × (3,5 + 12,5)
L = 22/2 × 16
L = 11 × 16
L = 176 cm²
Maaf Kalau Salah