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t=3a/2
b. a.t= 864 cm²
a. 3a/2= 864 cm²
a² = 864. 2/3
a = 576
a = √576
a = 24 cm
a) 2t = 3a
t = 3a/2
b) L = alas x tinggi
864 = a x t subtitusikan t = 3a/2
864 = a x 3a/2
864 = 3a^2/2
1728 = 3a^2
a^2 = 1728/3
a^2 = 576
a = akar(576)
a = 24 cm
t = 3a/2 = 3x24/2 = 36 cm
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