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SMP Kelas IV
alas = 18 cm
Luas = 135 cm²
L = 1/2 x alas x tinggi
135 = 1/2 x 18 x t
135 = 9 x t
t = 135 / 9
t = 15 cm
135=1/2 ×18×t
135=9t
t=135/9
t=15