13.3 Angles

In this lesson I will teach you about angles. As you can imagine angles have a huge role to play in geometry so we need to know them well. First, lets start with a basic definition of an angle- an angle is simply two rays that start from the same point called a vertex. Like all new shapes we learn in geometry we will need to master the symbols and notation associated with angles. Now, that you have a good sense of what an angle is we can explore the various possibilities of different type of angles- that's what I will cover in the lesson. I will classify different angles to include right, acute and obtuse angles. Also, we will explore a few key properties that angles contain. As our knowledge of geometry builds, you will learn much more about angles especially when they are formed in triangles or intersecting lines. Stay excited as you will see how geometry will relate to real life shapes and situations. One last thing- make sure to review your notes frequently to ensure you are retaining the material.


  1. Watch The Lesson Video First - Take Good Notes.
  2. Next, Scroll All The Way Down The Page To View The Practice Problems - Try Them On Your Own.
  3. Check The Solutions To The Practice Problems By Looking At The Answer Key At The End Of The Worksheet.
  4. However, YOU MUST Still Watch The Video Solutions To The Practice Problems; These Are The Videos Labeled EX A, EX B, etc. - They Are Located Next To The Lesson Video.
  5. After Doing All Of The Practice Problems - Complete The Section and Advance To The Next Topic.

Practice Problems:

13.3 GeoFoundationsAnglesPreview.pdf
Complete and Continue