There is more to congruency than just looking similar. Learn the difference and calculate the matching angles and sides to prove the congruence between figures. Lesson has step-by-step slides and follows with an assessment. 

From polyhedrons to platonic solids, here is a lesson that will have your classes talking! As an introduction to platonic solids, scholars cut and fold nets to create the three-dimensional solids. They use an interactive component to...

In this geometry instructional activity, 10th graders solve application word problems involving the use or right triangle trigonometry, including angle of elevation or depression. The one page interactive instructional activity contains...

Tenth graders are provided instructions, including a video, on calculating the surface area of a prism. The one-page interactive activity contains two worked questions. Answers are included. 

Begin by watching this captivating video showing how the concepts of similarity and congruence are found in road signs. Following the video [1:27], an interactive applet allows students to resize, flip, move and rotate triangles to...