sebuah prisma memiliki alas berbentuk trapesium sama kaki dengan panjang sisi-sisi sejajarnya 8cm dan 14 cm serta panjang kaki trapesium 10cm jika tinggi prisma 4cm hitunglah luas permukkaan prisma
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Alas prisma trapesium
a= 8
b = 14
s = 10
t trapesium =t= √(10² - (1/2 (14-8))² = √(10²-3²) = √91
t prisma = T = 4 cm
Luas Permukaan Prisma = 2 x (Luas alas) + Keliling Alas x tinggi prisma
LPP = 2 [ 1/2 (a+b) t] + (a+b+2c)(T)
LPP = (a+b) t + (a+b+2c)(T)
LPP = (8+14)(√91) + (8+14+20)(4)
LPP = (22√91 + 168) cm²
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