The text in the image seems to be related to a math problem or a geometry exercise. Here’s what I can gather from the content:

- It discusses a particular configuration involving a line segment (DA) and its vertical relation to another line (AH).
- The problem is associated with angles, specifically mentioning a 50-degree angle.
- The notation suggests a step in problem-solving, possibly involving triangle properties or coordinate geometry.

If you have specific questions or need help with a particular part of the content, let me know!