# Understanding the Geometry Basics Homework 5 Angle Addition Postulate

The Geometry Basics Homework 5 Angle Addition Postulate is an important concept in mathematics that is used to analyze the relationships between angles. It states that the sum of the measures of the angles of a triangle is 180 degrees. This postulate is important for students to understand when studying the basics of geometry. In order to understand this postulate, students must have a basic understanding of angles and triangles.

## Angles

An angle is formed when two rays (or lines) share a common point. The angle is measured by the amount of rotation needed to move one of the rays so that it lines up with the other ray. Angles can be classified in a variety of ways, based on their measures or the number of sides of the angle. The most common type of angle is the right angle, which has a measure of 90 degrees. Other types of angles include acute angles (measuring less than 90 degrees) and obtuse angles (measuring more than 90 degrees).

## Triangles

A triangle is a two-dimensional shape that is composed of three sides and three angles. The three angles of a triangle always add up to 180 degrees. Additionally, the sum of the lengths of any two sides of a triangle must be greater than the length of the third side. This is known as the Triangle Inequality Theorem. Triangles come in a variety of shapes, such as equilateral, isosceles, and scalene. The angles of an equilateral triangle are all equal, while the angles of an isosceles triangle are two equal angles and one unequal angle.