Khan Academy Static

Angle_bisector_theorem

Learn about the angle bisector theorem, which makes a clever use of triangle similarity in order to find a special proportion that holds for angle bisectors of triangles.

Solving_problems_with_similar_and_congruent_triangles

You already saw how we can use similarity and congruence to find missing measures in triangles. Let's do the same now to solve more kinds of polygons, and more challenging problems!

Solving_modeling_problems_with_similar_and_congruent_triangles

Now that you are an expert with solving geometry problems using congruence and similarity, you are ready to solve some real-world problems!

Solving_similar_triangles

Learn how to find missing measures of triangles using the fact that they are similar to other triangles.

Definitions_of_similarity

In this tutorial, you will learn how we determine whether two figures are similar.

Introduction_to_triangle_similarity

In this tutorial, we will use what we learned about similarity of polygons in the specific case of triangles. We will come up with specific conditions for triangles to be similar, and use them to determine whether two triangles are similar.

All video content by Khan Academy is under their license: CC by NC SA

Website created using Khan Academy Static Downloader