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The formula ## f=(\pi/5+\sin72^\circ/2-2\sin72^\circ\sin^236^\circ)/(\pi/5+\sin72^\circ/2)\\ ## from post #6 can be transformed into a...

I worked up the general case for integer ##n## overlapping circles. Here is the Desmos page; The red circle is the generator of the...

My answer was actually <0.4 at about 0.3974 so I am investigating my math… EDIT: I did the calculation another way and agree with @Gavran.

If anyone is interested, here is the case of five identical circles with a common point as in this diagram. Notice that there are now...

This is a little exercise for fun. Determine the area of the darker petals to the total area. The four circles are identical. Have fun!

"Due east" and "Due west" are directions, not locations. So there is no distance.

As @Filip Larsen suggests, 2 clockwise.

At the Earth’s poles, the answer is indeterminate. East and West do not exist.

Due East is 180 degrees from due West. I am capable of conceiving of directions as being "near" and "far" from each other. If I am...

By another measure, the distance between "Due East" and "Due West" is 2.

On the surface of the Earth, I would say the distance is 180 deg in the sense that if you face due East, then after a 180 deg turn...