Problem 467: Concentric Circles, Chord, Tangent, Congruence, Measurement.
Level: High School, College, SAT Prep.
The figure shows two concentric circles and a chord AB tangent to circle C_{2} at C. Prove that AC and BC are congruent.
Geometry problem solving
Geometry problem solving is one of the most challenging skills for students to learn. When a problem requires auxiliary construction, the difficulty of the problem increases drastically, perhaps because deciding which construction to make is an illstructured problem. By “construction,” we mean adding geometric figures (points, lines, planes) to a problem figure that wasn’t mentioned as "given."

Recent Additions
