Q1 on a map produced with a cylindrical projection (such as the mercator projection), the shortest flight path is shown as a straight line between: any two points on the equator any two points on the arctic circle portland, oregon and cairo, egypt rio de janeiro, brazil and capetown, south africa none of these q2 a value of zero-degree longitude occurs at the: north pole south pole equator prime meridian q3 the day on which the subsolar point is at 23.5°n is called the: june solstice december solstice vernal equinox autumnal equinox