Question: Example showed that Earth subtends at the Moon an angle of 0.0333 rad. Does this help you imagine what a full Earth looks like from the Moon? How can you make the number more meaningful?
Example: For example, given that the Moon is 60 Earth radii distant from Earth, what angle does Earth subtend at the Moon? Since Earth's diameter is 2 RE, then the angle subtended at the Moon is (2 RE)/(60 RE)=1/30 = 0.0333rad. If you're asked to find the angle in degrees, use the fact that 180°= π rad, so
