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Verified answer
Mapel : MatematikaKelas : VIII SMP
Bab : Limas
Pembahasan :
Ka = 4s
48 = 4s
Sisi = 12 cm
Lp Limas = La + 4Luas segitiga
Lp Limas = s² + 4(1/2 at)
Lp Limas = 12² + 4(1/2 . 12 . 10)
Lp Limas = 144 + 4(60)
Lp Limas = 144 + 240
Lp Limas = 384 cm²
Verified answer
K = 4s48 = 4s
s = 48:4
s = 12cm
Tinggi sisi segitiga :
akar 8²+6²
= akar 64+36
= akar 100
= 10 cm
Luas seluruh permukaan limas :
Luas alas+Luas 4segitiga berdiri
= (12×12) + [4 (1/2×12×10)]
= 144 + (4×60)
= 144 + 240
= 384 cm²