Step-by-step explanation:
Sum of measures of all internal angles of a hexagon is 720°
[tex] \therefore \: x + 120 \degree + 142 \degree + 137 \degree \\ \: \: \: \: \: \: \: \: \: \: + 151 \degree + 106\degree = 720 \degree \\ \\ \therefore \: x +6 56 \degree= 720 \degree \\ \\ \therefore \: x = 720 \degree - 656 \degree\\ \\ \therefore \: x = 720 \degree - 656 \degree \\ \\ \therefore \: x = 64 \degree[/tex]
