A 2.458Mb PDF of this article as it appeared in the magazine—complete with images—is available by clicking HERE
A-B-X-C is the corner of a "box". AX, XB, and XC are mutually perpendicular. What is the area of face A-B-C? What is the sum of the squares of the areas of the other three faces?
Dave Lindell, PS, retired after 36½ years with the City of Los Angeles. He keeps surveying part time to stay busy and keep out of trouble.
A solution to this problem can be found HERE
A 2.458Mb PDF of this article as it appeared in the magazine—complete with sketch—is available by clicking HERE