Question

Determine o valor de x para o quadrilátero abaixo

Answer 1

♦️Soma dos ângulos internos de um quadrilátero será igual a 360°

• $\sf{_{x+x+20^{\circ}+x+40^{\circ}+x+60^{\circ}=360^{\circ}}}$

• $\sf{_{4x+120^{\circ}=360^{\circ}}}$

• $\sf{_{4x=360^{\circ}-120^{\circ}}}$

• $\sf{_{4x=240^{\circ}}}$

• $\underbrace{\sf{_{x=60^{\circ}}}}$

♦️X será portanto igual 60°