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AQ : QB = 1 : 3 -- > 1 + 3 = 4
DT : TC = 1 : 1 --> 1 + 1 = 2
( 3, 4, dan 2 di cari KPK = 12(x))
AP : PD = 8x : 4x
AQ : QB = 3x : 9x
DT : TC = 6x : 6x
maka
sisi = 6x + 6x = 12x
arsir : persegi = (persegi - 2 segitiga) : persegi
= (12x*12x - 6x*4x:2 - 12x*9x:2) : 6x*6x
= 144x - 12x - 54x : 144x
= 78x : 144x
= 13 : 24 (D)
maaf ya kalo ga ngerti