In a bicentric quadrilateral ABCD, I
is the incenter and O the circumcenter, If AI =4 and CI =2, find the inradius.
A bicentric quadrilateral ABCD is a convex quadrilateral that has both an incircle
I and a circumcircle O.
Geometry problem solving is one of the
most challenging skills for students to learn. When a problem
requires auxiliary construction, the difficulty of the problem
increases drastically, perhaps because deciding which
construction to make is an ill-structured problem. By
“construction,” we mean adding geometric figures (points, lines,
planes) to a problem figure that wasn’t mentioned as "given."