Trigonometry Lesson 4

Measuring Angles Using Radians

In this lesson, the students will explore the radian as a unit of measure. They will estimate the measure in radians of arcs, and also help us think about the connection between radians and degrees. 

Episode 1: Making Sense

The students investigate the radian as a unit of measure. They start by estimating the measure of two angles in radians. 

Episode 2: Exploring

The students draw an angle that measures two radians. 

Episode 3: Repeating Your Reasoning

The students continue exploring angles by measuring two angles in radians. 

Episode 4: Reflecting

The students solidify how many radians are in various amounts of rotation and think about how that relates to degrees.