Jawabanmu

2014-09-02T14:54:45+07:00
A. AD² = BD x CD = 6 x 8
    AD = 
√48 = √16.3 = 4√3 cm

b. AB
² = BD x BC = 6 x 14
    AB = √84 = √4.21 = 2√21 cm

c. Luas ABC = 1/2 x BC x AD
    Luas ABC = 1/2 x 14 x 4√3
    Luas ABC = 28√3 cm²