Big Idea – We can describe, measure, and compare spatial relationships. to build on students' knowledge of triangle and develop students' reasoning with properties of different classes of triangles to ...

I first started teaching Geometry last year and have taken over "Informal Geometry" this year. As the name of the second class implies, the idea of formal proof is strongly de-emphasized; this class ...

MESSRS. Beckett and Robinson's interesting attempt to combine the main propositions of formal geometry with the extensions included in the easier portions of “modern plane geometry “and with the ...