tlong jawab pertanyaan nya,pake cara nya!jangan ngasal jawab!

[tex]bc = \sqrt{ {ab}^{2} + {ac}^{2} } \\ bc = \sqrt{ {6}^{2} + {12}^{2} } \\ bc = \sqrt{36 + 144} = \sqrt{180} \\ bc = \sqrt{36 \times 5} \\ bc = 6 \sqrt{5} [/tex]
semoga mmbantu

BC = 6²+12²
      = 36+144
      = 180
√180 = 6√5
maaf kalau salah.