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a. panjang seluruh rusuknya
2(12)+2(7)+2(6)+4(14)+2(8) = 24+14+12+56+16
= 122 cm
b.Luas trapesium ABCD
= 0.5 * (DC+AB) *DA
= 0.5 * (12+7) *6
= 33 cm2
c.LP prisma
= 2(La) + kll alas *tinggi
= 2(33) + (6+7+8+12) *14
= 66+ 462
= 528 cm2
semoga membantu dan mohon dikoreksi kembali