Chapter+1

In our first chapter we will be covering types of angles, properties of angles and applications of these ideas.

First, lets look at acute, obtuse and right angles. Can you see the relation that makes all of these angles acute? You're right!!! They are all less than 90 degrees.

Now lets see some obtuse angles. It is clear now that an obtuse angle is one that is greater than 90 degrees.

Lastly, a right angle. If we know acute is less than 90 degrees and obtuse is greater than 90 degrees. So a right angle must be...? EXACTLY 90 degrees!!

Now, lets look at this helpful video describing angles of polygons.

Angles

I hope this video helped clear up any questions. For homework I would like you to go on math-play.com and practice angles by playing these games.