Explore adjacent angles with this helpful reference tool. Provides a detailed definition, examples, and an interactive activity that enhances further explanation. Includes links to related topics.

Learn about congruent with this handy reference guide. Provides a detailed definition and examples that enhance further explanation. Includes links to related topics.

For this mini-lesson, you will learn about the definition of geometric shapes and view many examples. You can check out the interactive simulations to know more about the lesson and try your hand at solving a few interesting practice...

Students reflect on their work and apply what they've learned about the characteristics of geometric figures. Includes a learning game to be played with a partner.

Explore the structure and measurement of polygons.

In this lesson plan on area and perimeter, 3rd graders will learn how to find the area and perimeter of rectangles by applying formulas.

Finding the third angle of a triangle becomes easier by the explanation and examples presented.

This personal site presents some general information about polygons.

Find a quick, concise explanation of polygons. Examples are given and clearly explained.