jawab yang A aja makasiiii

jawaban no a yaitu
dc=ac-ad
dc=12-4
dc=8

a) CD = AC - AD = 12 - 4 = 8 cm
b) AB/DE = AC/CD
    AB/10 = 12/8
    8AB = 12 x 10
    AB = 120/8
    AB = 15 cm
c) CE/BC = DE/AB
    CE/CE+6 = 10/15
    15CE = 10CE + 60
    15CE - 10CE = 60
    5CE = 60
    CE = 60/5 = 12