The equatorial radius 3,396.2 kilometers (2,110miles).
The equatorial circumference of Mars is 21,339 kilometers (13,259 miles).
Compared to Earth, the ratio is .533, i.e. the radius and circumference of Mars is about half the radius and circumference of Earth.
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diameter = 2*radiuscircumference = pi*diameterThe equatorial diameter of Mars is about 6792 km, and its equatorial circumference is about 21,339 km.
Circumference = 2pi*r Circumference = 86pi
circumference of the tire.
circumference = 24.5