Product ID: Geometers Corner
Supplementary Print
High School
Getting A Better Angle
Author: Jonathan Choate
This month's column deals with one of my favorite problems. I originally found it in Heinrich Dorrie's 100 Great Problems in Elementary Mathematics [1], a wonderful book now out in paperback that I highly recommend. The problem is often referred to as the Problem of Regiomontanus and is reputed to be the first max-min problem of the modern age.
"At what point on the ground does a perpendicularly suspended rod appear largest [i.e., subtends the greatest visual angle]? It has been claimed that this was the first extreme problem in the history of mathematics since antiquity."

©2004 by COMAP, Inc.
Consortium 86
4 pages
Mathematics Topics:
Trigonometry, Geometry, Algebra
Application Areas:
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