Hi BurrMan,

- The horizontal line of A1-A2, with x√2 length comes first in the quiz.
- Followed by the 2 magenta lines with x length connected each other
- Arranged (move and rotate) the magenta lines in particular way
- ... so that if we draw 3 points circle (RED colored) through point A1,A2, and B, then it would also 'touch' C
- C should be on both Red Circle and V axis.

Cheers.