1. The problem statement, all variables and given/known data An observer on the earth observes the angle subtended by the diameter of the moon to be 0.009199 radians. If the moon is 234,800 miles away, what is its diameter? 2. Relevant equations 3. The attempt at a solution Not quite sure where to begin with this one. I think it may be a kinematics distance problem but not 100% sure. Suggestions?