Fold up a corner of a rectangular piece of paper. It is known that 〈 1 = 75 degrees, and find out 〈 2 = how many degrees Thank you! Help

Fold up a corner of a rectangular piece of paper. It is known that 〈 1 = 75 degrees, and find out 〈 2 = how many degrees Thank you! Help

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Use a piece of rectangular paper to fold it into a right triangle with an angle of 30 degrees. How do you fold it?

First, fold the rectangular paper into a square
The square is folding into an isosceles triangle
45 ° per angle
Then fold a 45 ° angle to a 90 ° angle
Now it's at the waist of this 45 degree angle
A dot appears
Then take this point and another 45 ° angle as the connecting point
Fold a 30 ° right angle

How to make a 60 degree angle with rectangular paper,

First, fold the square paper in half, then turn it into a rectangle, and then fold it along the diagonal line of the rectangle. Except for the right angle, the smaller angle is 30 ° and the larger angle is 60 °