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Panjang Alas = 45 Cm
Panjang Sisi lain = 1/2 x [152 - ( 2 x 45 )]
= 1/2 x [152 - 90]
= 1/2 x 62
= 31 Cm
Semoga Bermanfaat
sisi alas = sisi atas
jadi
152 = 2 (45+x)
152 = 90 + 2x
62 = 2x
x = 31