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Lp : (9+12+15) x 5 + 2 x (9 x 12 / 2)
Lp: 36 x 5 + 108
Lp: 180 + 108
Lp: 288
yeeeey :) jadi, luas permukaan prisma tersebut adalah 288
maaaf jika ada kesalahan dalam penulisan
semoga membantu ;)
=36 cm L = 2 x La + ( K x t )
= 2 x 1/2 x 12 x 9 + ( 36 x 5 )
= 108 +180
= 228 cm²
smg membantu............