Math Stinger # 132
by Steve Edwards, Professor of Mathematics

It is possible to divide a right triangle into smaller triangles so that all of the smaller
triangles have only acute angles.

The right triangle pictured has been dissected into 13 smaller acute triangles.
What is the smallest number of acute triangles that this right triangle can be
dissected into?

Send your solution  to sedwards@spsu.edu, or by snail mail to Steve Edwards in the Math 
Department.   The names of the first solvers will be posted here.

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