Question

Qual a medida dos angulos drsconhecidos

Answer 1

Resposta:

$30 + 10 + x = 180 \\ 40 + x = 180 \\ x = 180 - 40 \\ x = 140$

$110 + 40 + x = 180 \\ 150 + x = 180 \\ x = 180 - 150 \\ x = 30$

$18 + 90 + x = 180 \\ 108 + x = 180 \\ x = 180 - 108 \\ x = 72$