Sorry, this site will not function correctly without javascript. The scripts we use are safe and will not harm your computer in any way. Please enable javascript in your browser.

Triangles and Triangle Sum Theorem

For FREE access to this lesson, select your course from the categories below.

Students learn the definition of a triangle, as well as the following triangle classifications: scalene, isosceles, equilateral, acute, obtuse, right, and equiangular. Students also learn the triangle sum theorem, which states that the sum of the measures of the angles of a triangle is 180 degrees. Students are then asked to solve problems related to the triangle sum theorem using Algebra.

We help you determine the exact lessons you need.

We provide you thorough instruction of every step.

We`re by your side as you try problems yourself.

We test your knowledge until you`ve got it down.

We build your foundation if you`re struggling.