The figure below shows a right
with D on AC and E on BC so that BE = CE, CD greater than AD, and
angle ABD = angle CDE.
Prove that BD is
perpendicular to AC.
Mind Map: George Pólya's 1945 book,
"How to Solve It"
George Pólya's 1945 book "How to Solve It, A new aspect of
Mathematical Method", is a book describing methods of problem
solving. It suggests the following steps when solving a
mathematical problem: (1) First, you have to understand the
problem. (2) After understanding, then make a plan. (3) Carry
out the plan. (4) Look back on your work. How could it be
A mind map is a diagram used to visually organize information, knowledge, concepts or ideas.