Question

Me ajudem pls preciso entregar isso ainda hj!!!️️

Answer 1

Explicação passo-a-passo:

A soma dos ângulos internos de um triângulo é 180°.

2)

$2x+20^{\circ} +4x+40^{\circ} +6x+60^{\circ} =180^{\circ} \\\\12x+120^{\circ} =180^{\circ} \\\\12x=180^{\circ} -120^{\circ} \\\\12x=60^{\circ} \\\\x=\dfrac{60^{\circ} }{12} \\\\\boxed{\boxed{x=5^{\circ} }}$

4)

$x+60^{\circ} +70^{\circ} =180^{\circ} \\\\x+130^{\circ} =180^{\circ} \\\\x=180^{\circ} -130^{\circ} \\\\\boxed{\boxed{x=50^{\circ} }}$

5)

$X+90^{\circ} +30^{\circ} =180^{\circ} \\\\X+120^{\circ} =180^{\circ} \\\\X=180^{\circ} -120^{\circ} \\\\\boxed{\boxed{X=60^{\circ} }}$