Portland Joan of Arc statue in Northeast Portland's Coe Circle vandalized again Updated: Aug. 20, 2012, 9:38 p.m. | Published: Aug. 20, 2012, 8:38 p.m. By Larry Bingham, The Oregonian ...

Remember the circumference of a circle = π d and the diameter = 2 × radius. The arc length is 1 4 × π × 8 = 2 π. Rounded to 3 significant figures the arc length is 6.28cm.

Remember the circumference of a circle = π d and the diameter = 2 × radius. The arc length is 1 4 × π × 8 = 2 π. Rounded to 3 significant figures the arc length is 6.28cm.