Multiple choice

On a map drawn on Gnomonic projection, the great circle course between two points is shown by

  1. a sine curve

  2. a straight line

  3. a parabola

  4. an arc of a circle

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The Gnomonic projection is unique because all great circles appear as straight lines on this projection. This property makes it useful for navigation and plotting the shortest distance routes between two points on Earth's surface, since great circles represent the shortest path on a sphere.