Tolong sama caranya yaa

[tex]lm \: = \sqrt{ {kl}^{2} + {km}^{2} } [/tex]
[tex] = \sqrt{ {5}^{2} + {5 \sqrt{3 } }^{2} } \\ = \sqrt{25 + 75 } \\ = \sqrt{100 } \\ = 10[/tex]