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In this math lesson, learners use hinged mirrors to discover that regular polygons are composed of triangles tessellating around a center point.

In this math lesson, learners identify, describe, and construct the five regular polyhedra.

In this math lesson, learners arrange pattern blocks to create tessellations and to explore geometric patterns. Learners first explore making patterns with a variety of pattern blocks.

In this three-part math activity, learners explore shapes. In part one, learners identify, describe, and classify two-dimensional shapes.