Geometry- Angles

## What is an angle in Geometry?

# 2 Answers

In Geometry we use term "ray" to define an angle.

*Ray* is a line with the start point but no end point.

* Angle* is the figure formed by two rays with the common start point, called the

*vertex*of the angle.

/

A /

/

/

B /

C

Names of given angle are:

/ ABC or / CBA or / B

an angle is the conjoining point between two intersecting lines. these can be measured in degrees or radians. for example, a triangle ("tri- angle") has three angles, with all three adding up to 180 degrees. a square/rectangle has four angles, all of which are 90 degrees.

/_ this is an acute angle, it is smaller than 90 degrees

|_ this is a right angle, it is 90 degrees

\_ this is an obtuse angle, it is greater than 90 degrees