C 2 p r or d p. Now divide by 2 to find the arc length of the semi circle. So the answer of 8p was the answer for the whole circle so you have to multiply it by 34 which gives you 6p The answer to the arc length that they asked for.
Remember the circumference of a circle pi d and the diameter 2 times text radius.
But they only want the arc length of 34 of the circle. The length of an arc depends only on the radius of that circle and the central angle of the arc. Diameter of the original circle. The arc length is frac 1 4 of the full circumference.
