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= 2 x 27 / 2 x 8 + 20 x 6 + 8 x 20 + 17 x 20 + 21 x 20
= 216 + 120 + 160 + 340 + 420
= 1.256
Jadi, luas prisma trapesium adalah 1.256 cm²
Jawaban: C
= √[(21-6)² + 8²]
=√15² + 8²
= √289 = 17
LP = 2.Ltp + Ktp.t
= 2. 1/2 .(a+b) . t + (a+b+c+d).t
= (6+21).8 + (8+6+17+21).20
= 27.8 + 52.20
= 216+ 1040
= 1256 (c)
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