22.3 Inscribed Angles

In this lesson I will teach you about inscribed angles in a circle. An inscribed angle is an angle that is formed inside a circle and ends at an arc. As such, we will be taking about angle and arc measures in terms of degrees. I will be giving you some very important theorems so make sure you're up to excellent note taking. You may notice that algebra is "creeping" more and more into our lessons- as you will see in the formulas I will be giving you for inscribed angles. Please go back and review your algebra as you will need core algebra skills in geometry like solving equations. Also, I will continue to stress that circle problems like inscribed angles are all over exams like the SAT/ ACT- so you must practice everything I teach you. At this point in the course you have learned a lot and maybe you feel a little overwhelmed. The key to staying positive is constant review and practice- math takes time to learn so be patient, work hard and good things will happen. Enjoy the lesson!


  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:

22.3 GeoCirclesInscribedAnglesPreview.pdf
Complete and Continue