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=(2×1/2×D1×D2)+(4×s×tinggi prisma)
=(2×1/2×16 cm×30 cm)+(4×(30cm÷2)×20cm)
=480cm²+(4×15 cm×20cm)
=480cm²+(60cm×20cm)
=480cm²+1200cm²
=1680cm²
s=sisi
Maaf kalau salah!!!!