Geometry Angles Post 2

Types of Angles

For this unit of work we are only interested in shapes that are made with straight lines (and circles).  So we need to learn the basics of what actually makes a shape with straight lines.

The smallest picture on a flat page is called a point (looks like a dot).  Then we have a ray which is a line that goes in one direction from a point.  Then we have a line which goes in both directions.  Then we have a line segment which is part of a line. 

Here is a picture to explain what I mean.

When two lines met they create a vertex (aka a corner).  Then we've got our start of an angle. 


The angle is one of the base ideas of Geometry Mathematics.  It is something that we can have lots of learning on.  You need to know the names of the various types of angles...

Acute angle - little one.  like "a cute baby"

Reflex angle - bent over.  like having your arm twisted. 

Right Angle - 90 degrees.