1.tentukan panjang dc 2.tentukan panjang ad TOLONG JAWAB!!!

dc/ac=de/ba
12/12+x=5/15
(12+x)5=15.12
60.5x=60
300x=60
x=300/60
x=5

1. DC => AB/EF= AB/DC
15/25=15/x => 3/5=15/x => 3x=5×15=> 3x= 75 => x=75/3=> x=25
DC = 25 cm

2. AD => 5/15=12/12+AD=> 1/3=12/12+AD=> 12 AD= 3×12=> 12AD=36=> AD=36/12=> AD = 3 cm