a bicycle has a diameter of 648 mm and has 36 equally spaced spokes what is the approximate arc length

Answer 1

The circumference, C, of the wheel is 2d, where d = 648 mm, so C = 648π mm.

36 equally spaced spokes divide the circumference into 36 equal length arcs.

Arc length = 648π/36 = 18π ≈ 56.5 mm

Answer 2

Hi CJ,

Arc length=radius*central angle of wedge (radians)

The radius is half the diameter, so 324 mm.

To get the central angle of one wedge, divide 360 by 36, which is 10 degrees.

Convert from degrees to radians (10*π/180) and you get π/18.

Plug into the original equation and you have 324*(π/18) which is 18π mm for one wedge.

* If they want the entire arc length, it would be the circumference, 2πr= 648π mm.

I hope this helps!