Question

4) Calcule o valor de x nos paralelogramos abaixo:

Answer 1

Os ângulos opostos de um paralelogramo são iguais.

$\mathtt{a)}~\mathsf{2x+10^{\circ}=x+70^{\circ}}\\\mathsf{2x-x=70^{\circ}-10^{\circ}}\\\mathsf{x=60^{\circ}}\\\mathtt{b)}~\mathsf{3x-10^{\circ}=2x+8^{\circ}}\\\mathsf{3x-2x=8^{\circ}+10^{\circ}}\\\mathsf{x=18^{\circ}}$