Question

The great galaxy in Andromeda has an angular diameter along its long axis of about 5 degree. Its distance is about 2.2 millons light years. What is its linear diameter.

Answer 1

Convert 5 degrees to radians (about 0.09) and multiply that by the distance from Earth. That will give you the diameter.

It's a big one, like our Milky Way.

Answer 2

Is this answer correct

.09 * 2.2 = .198