The image appears to involve a geometric or trigonometric problem, likely with a triangle formed between points $A$, $B$, and $C$, along with some height (possibly representing a tower or building). There’s a red question mark and a green box suggesting missing values to determine.

Please confirm the details or provide context:

1. Are you solving for the height of the tower or a length (e.g., distance)?
2. Are the points $A$, $B$, and $C$ on the ground plane, or is one elevated (e.g., a vertical tower)?
3. Are there given angles, lengths, or other numerical data not visible or already included?

Let me know how to proceed! If you’d like me to extract content or text from this image (e.g., equations or measurements), let me know.