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keliling = 10+8+6
keliling = 24
1/2 keliling = s = 1/2 x 24 = 12
luas adalah
√s(s-a)(s-b)(s-c)
√12(12-10)(12-8)(12-6)
√12(2)(4)(6)
√12(48)
√576
=24 cm²
nah, alasnya adalah sisi AB
AB = 10 cm
Luas = 1/2 x a x t
24 = 1/2 x 10 x t
24 = 5 x t
t = 24/5
t = 4,8
maka tinggi = 4,8 cm