When the radius of 1 is 2, make a circular motion, turn three times as a cycle, and each point runs 240 degrees, that is, 8Pi/3, 2003/3=667 cycles and 2. If you turn twice, A goes 120 degrees and B goes 240 degrees, then the total is: A: 8pi/3 * 60 degrees.

B gone: 8Pi/3*668=( 178 1 and 1/3)Pi (the key to this problem is to make it clear that three points take turns to be the center).

2? Go along the edge, it should be 2 1, go to the vertex, turn an angle, and rotate around a straight line perpendicular to the plane where the center of the circle is located, and the center of the circle has no moving position.

The straight line segment is equal to the diameter, and the arc segment is a 60-degree arc. Together, it is exactly equal to 6 diameters plus a circle. Draw a picture? The total length is equal to (30+5Pi)