Grouping Shapes by Parallel and Perpendicular Sides

Which shapes go together based on parallel and perpendicular lines?

Geometry Image: Esplanade Theaters

What odd and interesting shapes can your students find in this geometric image?

Geometry Image: University Ave

What odd and interesting shapes can your students find in this geometric image?

Geometry Image: Victoria Conference Center

What odd and interesting shapes can your students find in this geometric image?

Geometry Image: Skytree

What odd and interesting shapes can your students find in this geometric image?

Geometry Image: Steigerwald

What odd and interesting shapes can your students find in this geometric image?

What’s In My Brain: Trapezoids or Not?

Which are trapezoids and which are not?

Intersecting Angles and Streets

There can never be just one angle.

Grouping Quadrilaterals In A Hierarchy

Can we classify quadrilaterals like we classify living things?

Lines, Line Segments, Rays, and Infinity!

A lesson about lines, line segments, and rays that avoids dull memorization. Instead, we ponder this delightful question: Which is longer, a ray or a line? Then, kids consider what these different geometric concepts would think about each other.