Question

What can be concluded if angle 1 =angle7

Answer 1

From the information given in the question,
the only possible conclusion is:

              If angle 1 is measured and angle 7 is measured,
           the two measurements will be identical.

If angle 1 and angle 7 are related to a particular shape or drawing,
then additional conclusions may be possible, but we'd need to see
the shape or drawing.