tolong bantu dijawab ya makasih semua

DE  = 20   , CD = 12   ,  CE = 16   ⇒ triple pythagoras

AD = 6 x 12  = 60 + 5x 
= 72  = 60 + 5x 
= 12 = 5x 
x = 12/5     , ⇒ AC = 12 + 12/5  = 14,4 

EB =  6 x 16  = 80 + 5x 
= 96   = 80 + 5x 
= 16 = 5x 
x = 16 / 5   ⇒  BC = 16 + 16/5  = 19,2 

makasih .