mohon bantuan jawaban secepatnya ya..

a. nilai x
AD/AE = DB/EC
6cm/x = 4cm/2cm(perkalian silang)
6cm . 2cm = x . 4cm
6 cm . 2cm/4cm = x
3cm = x

b. nilai y
AD /ED = AB/CB
6cm/y = (AD +DB) /10cm
6cm/y = (6cm+4cm)/10cm
6cm/y = 10cm/10cm(kali silang)
6cm. 10cm = y . 10cm
6cm.10cm/10cm = y
6cm = y

nb : / adalah per

beri jawaban terbaik ya