Lesson plan

Convert between radians and degrees by deriving a formula from the definition of radian

teaches Common Core State Standards CCSS.Math.Content.HSF-TF.A.1 http://corestandards.org/Math/Content/HSF/TF/A/1
teaches Common Core State Standards CCSS.Math.Practice.MP6 http://corestandards.org/Math/Practice/MP6

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Big Ideas: A circle’s central angle is equivalent to its corresponding arc length. When a circle has a central angle = 1 and arc length = 1, this special circle is called the unit circle. In this lesson, students will learn how to convert between radians and degrees. Following the investigation of a radian, students will now be able to use radians to understand different measurements that were previously understood as degrees. This is an important concept for Algebra II students because it helps them to understand trigonometric functions and measurements in the coordinate plan for the rest of their mathematics learning. Vocabulary: radians, degrees Special Materials: Paper Plate, String, 5 different colored pencils, scissors