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V prisma = 480 cm kubik
alas segitiga sama sisi
t prisma = 10√3
Dit :
Luas selubung prisma?
Jawab :
a) Luas alas
Volume = luas alas * tinggi
480 = luas alas * 10√3
luas alas = 480 / 10√3
luas alas = 16√3
b) panjang sisi
a*t = 16√3 *2
a*t = 32√3
a*t = 8*4√3
t = 4√3 cm
a = 8 cm
c) Luas sisi prisma
L = t * a
L = 10√3 * 8
L = 80√3
d) Luas permukaan
Lp = 2x(Luas alas) + 4x(Luas sisi prisma)
Lp = 2x(80√3) + 4x(16√3)
Lp = 160√3 + 64√3
Lp = 224√3 cm persegi