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Verified answer
B. BC = √(16²-12²)BC=√(256-144)
BC= √112
BC=4√7 cm
Perbandingan luas Δ
AB•CD= BC•AC
16•CD=4√7 • 12
CD = 48√7 : 16
CD = 3√7 cm
BD=√[ (4√7)² - (3√7)² ]
BD=√[112 - 63]
BD=√49
BD= 7 cm
a. AD = 16-7 = 9 cm
Karena
AD/AC= DC/BC= AC/AB
Maka ke-2 Δ tsb sebangun