The students developed their proofs by examining how new right triangles could be created from an original right triangle.

One idea he came up with was a mathematical equation that's used all the time, for example in architecture, construction, and measurement. What it means is that in a right triangle (where one ...

In one of their proofs, the two students took the definition of calculating with triangles to its extreme by filling one ...

With a simple swivel, the pieces spun around to transform the triangle into a square ... together with the categories, used proof by contradiction to find no matching paths.