Measuring angles in degrees and radians
Videos in this series
Please select a video from the same chapter
Video Images
Video Images
Video Images
Video Images
Video Images
Measuring angles in degrees and radians
Circular functions (Year 11)
Year 11
Why do we need an angle system other than degrees? Why are there even other angle systems? What is a radian anyway? Why do we need radians? Where did the idea of having 360 degrees in a circle come from? All of these questions (and more) and answered in this video! This video looks at what a radian is and why would need it when we have degrees. I look at the unit circle and how we can use it to define what a radian is and then look at converting between radians and degrees. Passing through the idea of notation there are then a number of worked examples where we convert between degrees to radians and radians to degrees. There is also the usual MaffsGuru humour - which is generally not funny - but spends rather too long asking for people to subscribe. This is needy maths! Hope you enjoy it!
Published: Oct. 20, 2018
Length: 16 mins and 17 seconds
Lesson notes

There are currently no lesson notes at this time to download. I add new content every week.
Exam resources

There are currently no associated exam questions for this topic.

Video tags

radians to degrees radians unit circle radians to degrees conversion radians vs degrees radians and arc length what is a radian in math what is a radian video what is a radian measure how do i convert degrees to radians what is the unit circle and how do we use it what is the unit circle used for Methods 1 and 2 Degrees and radians unit circle

Where videos relate to VCE and I have used VCAA questions the following should be noted:
VCE Maths exam question content used by permission, ©VCAA. The VCAA is not affiliated with, and does not endorse, this video resource. VCE® is a registered trademark of the VCAA. Past VCE exams and related content can be accessed at