A modest proposal for a new property

[hh]

@Richard G.

Everybody engaged in this thread knows about "within" and "intersect".
They are good and very effective where they are applicable.

Now solve this simple example:

Make a circular arc showing 70% of a pie and then tell us when clicking
into the oval which part is hit, the 70% or the transparent 30%.

A one-liner?

The OP's proposal, for example, would define a series of points along the outline path of the uncomplete pie as hit-region. Good idea.