The figure below shows a right triangle ABC (angle B = 90 degree)
with AB = 4 and BC = 3. The
incircle I is tangent to AB at D. The excircle E corresponding to BC is
tangent to BC at F. BI intersects DF at G. Find the measure of IG.

### Geometric Art of Problem 1421: Sketching, Typography, iPad Apps

See also:
Typography and poster of problem 1408.