Cho hình vuông ABCD . E là điểm trên cạnh DC, F là điểm trên tia đối của tia BC

This image contains a set of geometry problems in Vietnamese involving a square and other geometric figures. Here are the main points from the problems described:

1. **Problem 34**: Given a square ABCD, with point E on side DC and point F on the opposite ray of ray BC. The problem asks to prove various properties related to specific triangles and angles.

2. **Problem 35**: In a right triangle ABC with point A, several question parts include proving relationships with certain segments and confirming whether specific triangles are right-angled.

3. **Problem 36**: In a geometrical figure MNQP, there are questions regarding the angle measures and the relationships between the points. It also asks for specific conditions to determine if a triangle is right-angled.

4. **Problem 37**: Involves a square ABCD and point E, with questions related to segments and proving various properties of the geometric figures formed within.

If you need further assistance on any specific part or question from these problems, feel free to ask!