As shown in the figure, A and B are the two ends of the circle diameter, Xiao Zhang is at point A, and Xiao Wang goes in the opposite direction at the same time. They met for the first time at point C, 80 meters away from point A; Meet for the second time at point D, 60 meters away from point B, and find the circumference of this circle.

Analysis:

As shown in the picture, when they first met, they walked half a circle together; When we met for the second time, the two men got together and walked around. From the beginning, they walked together for a week and a half. So when we meet for the second time, the distance that two people walk together is three times that when we meet for the first time, so the distance from A to D should be three times that of A to C, that is, A to D is 80×3=240 (meters); Then calculate the length of the semi-circular arc according to the diagram and multiply it by 2;

Solution: 80× 3+60× 2 = 360 (m);

A: The circumference of this circle is 360 meters;

So the answer is: 360.