Covariational Reasoning Lesson 5

Defining a Radian

Having constructed a graph for the final task in the N-gon Task, Zoe and Gisele explore an important, and familiar, unit that will be used to hone their graph, the radian. Importantly, they work to construct the definition of a radian with quantitative meaning.

Episode 1: Exploring

In this episode, Zoe and Gisele make sense and explore a unit that they are familiar with, that of a radian. Through the exploration of a pair of applets, they begin to craft a definition for the radian.

Episode 2: Exploring

Zoe and Gisele work to relate a radian to a circle’s radius and conclude with a definition of a radian.