MATH 213 Study Guide - Midterm Guide: Platonic Solid
10 Jan 2019
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For each of the following statements, indicate if it is true (t) or false (f). Two lines can separate a plane into three disjoint regions. Two planes can separate space into four disjoint regions. ______ c. two circles can intersect in exactly three points. ______ d. two spheres can intersect in a circle. ______ e. a line can intersect a sphere in exactly one point. Consider the diagram at right of the sun, earth, and moon. Assume we are looking down on the north pole. A: put a dot on the earth to indicate where a person would be located who is experiencing midnight. Four locations in the moon"s orbit are indicated by letters in the diagram. Note that the moon is orbiting the earth in a counterclockwise direction from our perspective floating above the north pole. Circle all that would work (i. e. , would fold up into a cube).
