tolong bantu ya soalnya haei senin dikumpul!!!!

diket: Ac=12cm
EA=4cm
DB=6cm
DE=10cm
dit?: panjang CE,CD,AB
jawab: CE....?
AE+CE=AC
4+CE= 12
EC= 8

CD......?
CD/DB = 8/4
CD/6=2
CD= 12

AB....
AB/10= 6+12/12
AB/10=18/12
AB/10= 3/2
AB = 30/2
AB=15

semoga membantu