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Everyday geometry: Hidden figures and polygons

A lesson plan for grade 5 math in which students use historical photographs and drafting plans to demonstrate their knowledge of mathematical figures and polygons.

Format: lesson plan (grade 3–5 Mathematics)

By Sonna Jamerson.

Resources on the web

Covering the plane with rep-tiles

In this lesson from Illuminations, students discover and explore a special kind of tiling of the plane. Rep-tiles are geometric figures such that n copies can fit together to form a larger, similar figure. Students experiment with various shapes and values... (Learn more)

Format: lesson plan (grade 5–7 Mathematics)

Provided by: Illuminations

Exploring properties of rectangles and parallelograms using dynamic software

Dynamic geometry software provides an environment in which students can explore geometric relationships and make and test conjectures. In this example, properties of rectangles and parallelograms are examined. The emphasis is on identifying what distinguishes... (Learn more)

Format: lesson plan (grade 3 and 5 Mathematics)

Provided by: Illuminations

Investigating the concept of triangle and properties of polygons

This two-part example from Illuminations describes activities using interactive geoboards to help students identify simple geometric shapes, describe their properties, and develop spatial sense. This first part, Making Triangles, focuses attention on the... (Learn more)

Format: lesson plan (grade K–2 Mathematics)

Provided by: Illuminations

Polygons

In this Illuminations lesson, students identify and classify polygons according to various attributes. They then sort the polygons in Venn Diagrams, according to these attributes. Students will: precisely describe, classify, and understand... (Learn more)

Format: lesson plan (grade 3 and 5 Mathematics)

Provided by: Illuminations