Calculate the size of angle marked in each diagram below

Incomplete.

To calculate the size of an angle in a diagram, we need to identify any information given in the diagram that can help us determine the angle's measurement. Here's how you can approach it for each diagram:

1. Diagram not provided (Please provide the diagram.)

2. Diagram not provided (Please provide the diagram.)

3. Diagram not provided (Please provide the diagram.)

4. Diagram not provided (Please provide the diagram.)

If you can provide the diagrams or any additional information related to the angles, I would be happy to help you calculate their sizes.