a: CH=16^2/24=256/24=32/3(cm)
BC=24+32/3=104/3cm
AC=căn 32/3*104/3=16/3*căn 13(cm)
b: BC=12^2/6=144/6=24cm
CH=24-6=18cm
AC=căn 18*24=12*căn 3(cm)
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