Point
triangle!
a cone that does not have a tip
Point
A sphere perhaps
a point, dot, hole, vagina you can use any of those 4
Point
triangle!
A point
a cone that does not have a tip
Point
A sphere perhaps
I have no idea ask you
plane
a plane
Geometric probability is the probability of a random event within taking place a geometric plane. The idea of geometric probability covers a wide range of problems, but the common theme is probability as it applies to geometric shapes and objects.
This could vary depending on the pen, but it would most likely be a right, circular cone, frequently with the tip removed.
ball-point pen: sphere