Students will determine several ways to trisect a square. They will use Cabri Jr. to verify the square has been trisected and then prove their trisection using postulates and theorems from geometry. Supplementary worksheets are included...

[Free Registration/Login Required] Students explore the concept of pythagorean triples by navigating through the interactive learning module and then answering questions that go along with the module. Students can also learn more about...

In this section different interactive activities are presented which can be used as supplementary material to traditional classroom and allow for interactive study of mathematics.

After a childhood spent acting a pretty iconic role, Danica McKellar learned that she was capable of being more than just Winnie Cooper. [3:30]

Determine the missing angle measures of quadrilaterals inscribed in circles.

[Free Registration/Login may be required to access all resource tools.] Students watch a video and attempt practice problems on how to determine missing angles in a parallelogram.

[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.

This site offers numerous activities for middle school and high school students to explore using Geometer's Sketch Pad.

This lesson will demonstrate the use of CPCTC in triangle congruencey proofs. It is 2 of 4 in the series titled "CPCTC."

Formulas and illustrations show the different kinds of angles created by intersecting tangents, secants, radii, and in combination.