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This page provides a list of educational videos related to Radian Measure. You can also use this page to find sample questions, apps, worksheets, lessons , infographics and presentations related to Radian Measure.
Calculating the Radian Measure of an Angle
By AlRichards314
This video shows us how the radian measure of an angle is calculated. Remember that this does not change the angle, it is just another way for us to write its measure (somewhat in the same way that we can write a temperature in Celsius or Fahrenheit). This video shows us the measure of 1 radian, which will always be the same: 180 degrees/ pi, or about 57 degrees.
Radian and degree | Unit circle definition of trig functions | Trigonometry | Khan Academy
By Khan Academy
This video explains what a radian is and how we determine the radian measure of an angle. The key point here is that the radian measure of an angle is the length of the arc (in radius lengths) cut off by that angle (if the angle's vertex is on the center of the circle). You may ask: Won't the size of the circle affect the radian measure of an angle? A key feature of circles is that they are all similar (and thus, proportional). When we account for their larger size, we take into account the larger radius. As a result, the radian measure is the same for all circles (since the radian measure is how many radius lengths long the arc is).
Radians on the unit circle
By Khan Academy
Sal determines the quadrant at which a ray falls after a rotation by a certain measure of radians.
04 - What is the Unit Circle? Angle Measure in Degrees, Reference Angles & More.
By Math and Science
Quality Math And Science Videos that feature step-by-step example problems!
05 - What is a Radian Angle? Convert Degrees to Radians & Radians to Degrees - Part 1
By Math and Science
Quality Math And Science Videos that feature step-by-step example problems!