[Free Registration/Login may be required to access all resource tools.] Students watch a video and try practice problems on identifying and continuing geometric patterns.

[Free Registration/Login may be required to access all resource tools.] Students watch a video overview on the properties of parallel lines.

[Free Registration/Login may be required to access all resource tools.] Students watch a video and attempt practice problems to determine if lines are parallel.

[Free Registration/Login may be required to access all resource tools.] Students watch a video and attempt practice problems on identifying and naming three dimensional figures.

[Free Registration/Login may be required to access all resource tools.] Students watch a video and attempt practice problems on identifying faces, edges and vertices of three dimensional shapes.

[Free Registration/Login may be required to access all resource tools.] Students watch two videos and attempt practice problems on how to determine if two lines are perpendicular.

[Free Registration/Login may be required to access all resource tools.] Students watch a video overview and attempt practice problems on finding the missing angles in a trapezoid.

[Free Registration/Login may be required to access all resource tools.] This learning module features five videos and a set of practice questions in which students learn to compute linear measures, given edge or surface measures of...

ThatQuiz is an excellent assessment tool for teachers and students. At this site, teachers can create individualized or group assessments on a variety of math topics. Students take these practice assessments directly online and receive...

Can you help Leela find objects of different 3D shapes in her parents' tea store?

This example provides a clear explanation of how to compare figures to see if they are similar and the formula to determine if the ratios are equal. Interactive practice activities are provided.

A definition and several examples of rotational symmetry. View two animations showing types of rotational symmetry, as well as real-life examples, including a dartboard and Ferris wheel.

Find a definition of regular polygon, and learn how to calculate the internal angle, external angle, and number of diagonals of a regular polygon. Also, learn how to find the area of regular polygons.

Learn what an interior angle of a polygon is and how you can calculate their value in triangles, quadrilaterals, and pentagons. Includes a chart that overviews the "general rule" for determining the sum of internal angles in any polygon...

This is an excellent outline of the terms used to describe polygons as well as the definitions of the different types.

Looks at the lines of symmetry in different types of polygons. Includes ten practice questions. Each question is accompanied by an explanation of the answer.

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

Straightforward lesson plan designed to introduce students to symmetry and reflection using MIRA mirrors. Includes two worksheets--instructions and activities are available in English and Spanish.

Simple lesson designed to help learners learn the geometric concepts of translation, reflection, and symmetry by creating Navajo weaving patterns. Includes templates and instructions and is available in English and Spanish....

Straightforward lesson that introduces students to pi by letting them measure real objects and solve a challenge problem. Includes instructions and a "Data Sheet" for keeping track of measurements. Available in English and Spanish.

This video geometry lesson [6:14] explains the concept of perimeter and has varied exercises for students to practice.

Students make a series of geometric drawings of points, obtuse angles, rays, polygons, and the like. Each child is given one but not allowed to show anyone else. The drawing is then taped to the back of the child in front of them. The...

This tutorial provides illustrations for regular 2-D shapes as well as a definition for polygons and for regular polygons.

Five sets of tangram puzzles to challenge yourself with.