Geometric patterns -- triangles in particular -- seem to be everywhere these days. Here are a few stylish but subtle ways to incorporate angles and give softer spaces a brainy edge. The Brendan ...

Pros explain how to incorporate these vintage patterns and bold colors in a modern way.

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