MOSHE STUPEL, AVI SIGLER, JAY JAHANGIRI, Teaching proofs without words using dynamic geometry, The Mathematical Gazette, Vol. 103, No. 557 (July 2019), pp. 204-211 ...

Students who made math history when they were in high school have now published new ways of proving the Pythagorean Theorem using trigonometry.

In this article we examine students' perspectives on the customary, public work of proving in American high school geometry classes. We analyze transcripts from 29 interviews in which 16 students ...

A Sequel to the First Six Books of the Elements of Euclid, containing an Easy Introduction to Modern Geometry, with numerous Examples. By John Casey (Dublin University Press Series, 1881.) ...