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5^2 + 12^2 = 13^2
maka Luas Alasnya = 1/2 x a x t
= 1/2 x 5 x 12 = 30
volume prisma = luas alas x T.prisma
450 = 30 x T
T = 450/30
T = 15 cm (D)
semoga membantu ya..