Question

giúp mk với huhuhu

Answer 1

\(BH=\sqrt{5^2-4^2}=3\left(cm\right)\)

\(AC=\sqrt{4^2+12^2}=4\sqrt{10}\left(cm\right)\)

BC=3+12=15(cm)

\(C=AB+BC+AC=15+5+4\sqrt{10}=20+4\sqrt{10}\left(cm\right)\)