Interior grazing problem

> Find the value of r so that the white area is equal to half the sum of the white and red area.

Why do you express it that conusing way? Why don't you simply say that the red and the white area should be equal or that the white area should be half of the full circle with radius 1?

Where are your attempts? Attach your worksheet...

Here is a link to this "Goat problem"

https://en.wikipedia.org/wiki/Goat_problem

The problem was already discussed here exactly two years ago (Fred brought it up) - seems to be a Christmas problem 😉

Solved: The goat problem - PTC Community

And if this is not a leger, if you really think that Mathcad can solve the problem symbolically, then I congratulate you on your optimism. 😉