This video lesson [2:10] shows examples for classifying triangles by their side lengths. Students can check their understanding with an assessment.

Similar figures are investigated in this video lesson. [4:30] It provides detailed examples using proportional relationships. Students can check their understanding with an assessment.

This video lesson demonstrates how to use the characteristics of a square to find angle measures and side lengths. [4:31]

This video lesson [3:32] demsonstrates how to rotate geometric figures in the coordinate plane. Students can check their understanding with an assessment.

This video lesson introduces and provides examples of the Hypotenuse-Leg Triangle Congruence Theorem. Students can check their understanding with an assessment.

This video lesson demonstrates how to find the area of any regular polygon using the apothem. Students can check their understanding with an assessment.

Equilateral triangles are explored in this learning tutorial, which includes several videos [4:18; 4:18; 3:18] and a PowerPoint presentation. The lesson includes an introduction of equilateral triangles and their key characteristics....

Follow along with this tutorial to see an example of how to determine if two given figures are similar. [7:49]

Students watch a video about similar and congruent triangles.

Students learn how to prove that two triangles are congruent using midpoint of line segments.

Students watch a video tutorial showing that segments have the same length using triangle congruence properties.

This lesson will provide practice problems that involve solving for unknown angle and side measures of equilateral triangles. It is 4 of 5 in the series titled "Equilateral Triangle Interior Angles Practice Problems."

This lesson will provide practice problems that involve solving for unknown angle and side measures of equilateral triangles. It is 2 of 5 in the series titled "Equilateral Triangle Interior Angles Practice Problems."

This lesson will provide practice problems that involve solving for unknown angle and side measures of equilateral triangles. It is 3 of 5 in the series titled "Equilateral Triangle Interior Angles Practice Problems."