To find the coordinates of points $C$ and $D$, we would typically need information about either the geometry (e.g., a shape or figure) they form part of, the distances between points, or equations of lines on which they lie. However, if the points $C$ and $D$ are on a geometric shape or have certain properties (such as being on a line segment or lying on the Cartesian plane), I can guide you through how to determine their coordinates based on additional details.

Could you provide more context or relevant information about the diagram? For example:

1. Is there a shape (like a triangle, square, or line segment) involved?
2. Are there other points given with known coordinates?
3. Any specific relationships or distances between these points?
4. Are $C$ and $D$ midpoints, endpoints, or intersections?

Feel free to clarify, and I’ll help you find the coordinates.