Question

Calcule o valor do ângulo B e do ângulo A​

Answer 1

$\large\boxed{\begin{array}{l}\rm\alpha+2\cdot80^\circ=180^\circ\\\rm \alpha+160^\circ=180^\circ\\\rm \alpha=180^\circ-160^\circ\\\rm\alpha=20^\circ\\\rm \alpha+\beta+60^\circ+80^\circ=180^\circ\\\rm20^\circ+\beta+140^\circ=180^\circ\\\rm\beta=180^\circ-140^\circ-20^\circ\\\rm\beta=20^\circ\end{array}}$

Answer 2

Resposta:

Explicação passo a passo:

B = 180 -80-80 =180 -160 = 20° ✓

A= 180 -60-100= 180 -160= 20° ✓