Question

giúp mình câu c

 

Answer 1

a: \(BD=\sqrt{3^2+4^2}=5\left(cm\right)\)

b: \(AI=\dfrac{3\cdot4}{5}=2.4\left(cm\right)\)

\(AK=\dfrac{AD^2}{AI}=\dfrac{3^2}{2.4}=3.75\left(cm\right)\)

DK=2,25cm

c: \(KC=4-2,25=1.75\left(cm\right)\)