Students investigate when two shapes are similar. Definitions and examples are included.

Students will have fun making tessellations in this activity, which they can then print out.

Gives a clear definition and drawing of an exterior angle of a polygon.

Gives a clear definition and drawing of an interior angle of a polygon.

Students learn about perimeter. Notes, examples, and practice problems are included in the tutorial.

Find definitions and images of line, line segment, and ray.

A "one star" geometry problem that requires finding the visual pattern and applying logic with basic math skills to find the patterns.

A "one star" geometry problem that requires finding the visual pattern and applying logic with basic math skills to solve.

A "one star" geometry problem that requires finding the visual pattern and applying logic with basic math skills to find the perimeter from the sequence.

A "one star" geometry problem that requires finding the visual pattern and applying logic with basic math skills to find triangles in a pattern.

A "one star" geometry problem that requires problems solving skills and exercises ones visual-spatial abilities. One may want to cut out the pieces to solve the problem as a puzzle.

A "one star" geometry problem that requires finding the visual pattern and applying and pattern extensions to solve the false ceiling problem.

A "one star" geometry problem that requires finding the visual pattern and applying logic with pattern recognition to solve this number of triangles problem.

A "one star" geometry problem that requires problems solving skills and exercises ones visual-spatial abilities.

A "one star" geometry problem that requires problems solving skills and exercises ones visual-spatial abilities.

A "one star" geometry problem that requires problems solving skills where drawing a picture might help with the answer.

A "one star" geometry problem that requires visualizing to find how many different patterns can be made.

Geometry lesson on line symmetry with practice exercises.

This geometry lesson and video explain angle measure, how to measure angles with a protractor, and has varied exercises for the students.

Brain binders are great teacher sources for problem solving and critical thinking with geometry. Students fold sheets of paper to create solid colors on each side. Various levels are included starting with two folds through five folds.

An integrated geometry instructional activity on spatial sense in which students identify and use different shapes to create a tessellation. "Through a variety of modalities such as writing, music, art, poetry, and literature, students...

The objective of this lesson plan is for students to, "explore spatial relationships by determining the area of various shapes and creating tessellation patterns." Using a variety of hands-on activities, students apply concepts of...

Definition of congruent. Choose the "here's more" link to see examples of a rotation, reflection and translation.

This tutorial gives a very basic definition of lines.