Fold a piece of rectangular paper as shown in the figure, where ∠ 1 = 30 ° do you know how many degrees ∠ 2 equals?

Fold a piece of rectangular paper as shown in the figure, where ∠ 1 = 30 ° do you know how many degrees ∠ 2 equals?

As shown in the figure, ∠ 2 = (180 ° - 30 °) / 2 = 150 ° / 2 = 75 °