Penjelasan dengan langkah-langkah:
1.B.limas segitiga
2. jari jari = diameter/2
jari jari = 7/2
jari jari = 3,5 cm
Luas Permukaan = πr² + 2πrt
= (22/7 × 3,5²) + (2 × 22/7 × 3,4 × 18)
= (22/7 × 12,25) + (44/7 × 56,52)
= 38,5 + 355,27
= 393,77 cm²
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Penjelasan dengan langkah-langkah:
1.B.limas segitiga
2. jari jari = diameter/2
jari jari = 7/2
jari jari = 3,5 cm
Luas Permukaan = πr² + 2πrt
= (22/7 × 3,5²) + (2 × 22/7 × 3,4 × 18)
= (22/7 × 12,25) + (44/7 × 56,52)
= 38,5 + 355,27
= 393,77 cm²