2. If the diameter of a circle is 4m, then the circumference of the circle is π d = 3.14× 4 =12.56m. ..

3. The distance is 1/2× 3π+1/2× 2π+1/2×1π = 3π.

If you press 2, the distance is 1/2(3+2+ 1)π=3π.

So the two roads are generally close.