Nautical miles Refer to Exercise. If angle ACB has measure 1′, then the distance between A...

Nautical miles Refer to Exercise. If angle ACB has measure 1′, then the distance between A and B is a nautical mile. Approximate the number of land (statute) miles in a nautical mile.

Measuring distances on Earth The distance between two points A and B on Earth is measured along a circle having

center C at the center of Earth and radius equal to the distance from C to the surface (see the figure). If the diameter of Earth is approximately 8000 miles, approximate the distance between A and B if angle ACB has the indicated measure:

(a) 60°

(b) 45°

(c) 30°

(d) 10°

(e) 1°

EXERCISE