D = A + B
A triangle is a polygon with three sides and three angles. Triangles are one of the most basic and fundamental shapes in geometry, and understanding their properties is crucial for success in mathematics.
Another important concept is the , which states that the measure of an exterior angle of a triangle is equal to the sum of the measures of the two remote interior angles. For example, if you have a triangle with exterior angle D and remote interior angles A and B, the relationship can be expressed as:
As you prepare for your Unit 5 test on relationships in triangles, it's essential to review the key concepts and theorems that will be covered on the exam. In this study guide, we'll provide an in-depth look at the relationships between angles, sides, and other properties of triangles.