Jawaban:
D. 1440
Penjelasan dengan langkah-langkah:
BANGUN RUANG DATAR LIMAS
s = 20 cm
½s = 10 cm
Volume = s² × t
3
t = 3 × 3.200
20²
t = 9.600
400
t = 24 cm
t∆ = √(t² + ½s²) = √(24² + 10²) = √(576 + 100)
t∆ = √676
t∆ = 26 cm
Luas Permukaan Limas
= s² + 2 × s × t∆
= 20² + 2 × 20 × 26
= 400 + 1.040
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Jawaban:
D. 1440
Penjelasan dengan langkah-langkah:
BANGUN RUANG DATAR LIMAS
s = 20 cm
½s = 10 cm
Volume = s² × t
3
t = 3 × 3.200
20²
t = 9.600
400
t = 24 cm
t∆ = √(t² + ½s²) = √(24² + 10²) = √(576 + 100)
t∆ = √676
t∆ = 26 cm
Luas Permukaan Limas
= s² + 2 × s × t∆
= 20² + 2 × 20 × 26
= 400 + 1.040
= 1.440 cm²