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Sisi alas: 5, 12, 13. Sisi siku-sikunya adalah 5 dan 12.
L alas = 1/2*5*12= 30
t = 450/30 = 15 cm
450 = Lsegitiga x tinggi
450 = setengah.a.t x t
450 = 0.5 x 12 x 5 x t
450 = 30 x t
450I30 = t
15 = t
=)