Question

The earth has a diameter of 7917.5 mi. What is the arc length of half the earth?

Answer 1

Arc length is 12436.8m

Explanation:

arc length =
`(M degree)/(360degree)` * πD

where M is the angle measure of the arc

and D is the diameter

considering the earth as a circle and half the earth as a semi circle the angle measure of the arc will be = 180 degrees

`(180)/(360)` * π * 7917.5 = 12436.8m