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=akar 225
=15 cm
L. Alas=(alas+bawah)×tinggi alas÷2
=32×15÷2
=240cm²
K. Alas=12+17+20+15
=64cm
Lp prisma= 2×La+Ka×Tinggi prisma
=2×240+64×20
=480+1280
=1760cm ²
Vprisma=La×Tinggi prisma
=240×20
=4800cm kubik.
maaf nomor 5 gatau.
semoga membantu:).