Tolongg jawab dengan cara kerjax

CD = √ CE² + DE² = √8² + 6² = √64+36 = √100 = 10

AB/CE = AC/CD
AB = AC*CE / CD = 15*8 / 10 = 12

BC/DE = AC/CD
BC = AC*DE / CD = 15*6 / 10 = 9

Luas ABC = BC*AB / 2 = 9*12 /2 = 54 (A)