Stimulating collection of unusual problems dealing with congruence and parallelism, the Pythagorean theorem, circles, area relationships, Ptolemy and the cyclic quadrilateral, collinearity and concurrency and many other topics. Arranged in order of difficulty. Detailed solutions.

שם הספר
Teaching Secondary Mathematics: Techniques and Enrichment Units (8th Edition)
Challenging Problems in Algebra (Dover Books on Mathematics)
Fundamentals of Algebra: Sourcebook, Course 1
Foundations of Algebra Practice Book (Progress in Mathematics)