The moon has a diameter of 3.48 x 106 m and is a distance of 3.85 x 108 m from the earth. the sun has a diameter of 1.39 x 109 m and is 1.50 x 1011 m from the earth. determine (in radians) the angles subtended by (a) the moon and (b) the sun, as measured by a person standing on the earth. (c) determine the ratio of the apparent circular area of the moon to the apparent circular area of the sun. these calculations determine whether a total eclipse of the sun is really "total."