There are many properties of an angle, but some of the most basic and important ones are that an angle is a measure of rotation, and that it has direction. Other properties include that an angle is usually created by two lines, that it can be represented by a point on a circle, and that it has a size or magnitude.

## What is the measure of an angle that is supplementary to a given angle?

The measure of an angle that is supplementary to a given angle is 180 degrees minus the measure of the given angle. This is because the sum of the measures of the two angles must equal 180 degrees, and so the measure of the supplementary angle must be what is needed to make the sum total 180 degrees.

## Frequently Asked Questions

### What are the properties of angles?

Angles always add up to 180 degrees. The sum of all angles around a point is always 360 degrees.

### What is an angle in geometry?

In geometry, an angle is the result of the intersection of two lines, rays, or line segments. When these objects intersect in the same plane, they form an angle. There are three main types of angles: acute (or right), obtuse (or sharp), and reflexive. Each type has its own properties and requirements.

### What is an angle formed by two rays?

An angle is simply a figure formed by two rays, sharing a common endpoint. Angles are typically measured in degrees, and can be classified according to their orientation (傾向)—that is, which side of the vertex they are on.

### What are the basic terms of lines and angles?

Lines and angles are basic terms in geometry. Lines were introduced by the ancient mathematicians to represent straight objects that did not have any width or depth. Types of lines and angles in geometry include: line segments, angles,radii, and polygons. Properties of lines and angles include being straight, having a certain length and breadth, and sharing a common point.

### What are the names of all angles with properties?

There are a total of eight angles with properties. Acute angle, reflex angle, full rotation, and three other angles that have less common names.