Question

Qual o valor de x? AB=AC​

Answer 1

$\mathsf{3c=180^{\circ}}\\\mathsf {c=\dfrac{180^{\circ}}{3}=60^{\circ}}$

$\mathsf{x+120^{\circ}=180^{\circ}\to~x=180^{\circ}-120^{\circ}=60^{\circ}}$