a: CH=8-2=6cm
\(AH=\sqrt{2\cdot6}=2\sqrt{3}\left(cm\right)\)
\(AB=\sqrt{2\cdot8}=4\left(cm\right)\)
b: \(BH\cdot BC=BA^2\)
\(BD\cdot BK=BA^2\)
Do đó: \(BH\cdot BC=BD\cdot BK\)
a: CH=8-2=6cm
AH=√2⋅6=2√3(cm)AH=2⋅6=23(cm)
AB=√2⋅8=4(cm)AB=2⋅8=4(cm)
b: BH⋅BC=BA2BH⋅BC=BA2
BD⋅BK=BA2BD⋅BK=BA2
Do đó: BH⋅BC=BD⋅BK