Something's wrong! All the right triangles shown in the figure below are
congruent because they are all 30-60-90 right triangles, and each has a
hypotenuse which is a side of the regular hexagon. If you are using
brackets to denote AREA, then you must either have
[AFP] = 20 and [ABC] = 40
or
[AFP] = 12.5 and [ABC] = 25
but not
[AFP] = 20 and [ABC] = 25
Edwin