Classify two-dimensional figures based on the presence or absence of parallel or perpendicular lines, or the presence or absence of angles of a specified size. Recognize right triangles as a category, and identify right triangles.

How Do You Classify Triangles?

Being able to classify triangles is an important skill. If you know what kind of triangle you're looking at, it's much easier to figure out how to solve for various sides and angles. Practice classifying triangles with this tutorial!
What are Acute, Obtuse, and Right Triangles?

Did you know that there are different kinds of triangles? Knowing how to identify these triangles is an important part of solving many problems involving these triangles. Check out this tutorial and learn about some of the different kinds of triangles!