See also the Dr. Math FAQ: Browse High School Triangles and
Other Polygons Stars indicate particularly interesting answers
or good places to begin browsing. Selected answers to common
questions: Area of an irregular shape. Pythagorean theorem
proofs. - Diagonals and Axes of Symmetry [03/31/1998] Could you
explain the concepts behind the diagonals and axes of symmetry
in a regular octagon? - Diagonals and Tiles [11/17/2001] Jay
tiled a 15x21' rectangular ballroom with 1 ft. sq. tiles. Then
he drew diagonals connecting opposite corners of the room. How
many tiles did the diagonals pass through? - Diagonals of
Polygons [05/21/1997] How many diagonals does a polygon with n
sides have? - Diameter of a Circle Circumscribed Around a
Triangle [05/13/1998] Applying the Pythagorean Theorem to find
the diameter of the circle circumscribed around a triangle with
side lengths 25, 39, and 40. - The Diameter of an Octagon
[7/25/1996] What is the diameter of an octagon with each side
length equal to 2 - Diameter of Flying Sa