are AB and arc CD have same number of arc degree?
To determine whether AB and arc CD have the same number of arc degrees, you need to have additional information. Specifically, you would need the measurements of both AB and arc CD in arc degrees.
Arc degrees are a unit of measurement used to describe angles in a circle. A full circle is 360 degrees. If you have the measurements of AB and CD in arc degrees, you can compare them to determine if they are equal.
However, without any information about the measurements of AB and arc CD, it is not possible to determine if they have the same number of arc degrees.