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Find the area of figure ABCD. At B and C, the lines are tangent to the circular curve with arc BC. Arc BC is subtended by an angle of exactly 63° at radius point X.
The solution to this problem can be found HERE
Dr. Richard Elgin is semi-retired, working part-time for ArcherElgin Surveying and Engineering, LLC in Rolla, Missouri. He also is an Adjunct Professor of Civil Engineering at Missouri University of Science and Technology. Dick is a practitioner, professor, researcher and author.
A 474Kb PDF of this article as it appeared in the magazine—complete with images—is available by clicking HERE