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Link to Desmos activity

Teacher.Desmos Overview

Using Desmos

Prior to this activity read the teacher guide on Desmos and work through the activity yourself.

Activity 1

1.  Vocabulary review with students the following words:

Radius
degree
Central angle
sector
arc
                        

2. Give the students the class code for the desmos activity and get their technology

Activity 2

1. Help the students login to the activity, Depending on your students, you may need to stop frequently during the activity. 

2. Please pick out your stopping points and when it would be a good idea to introduce the formula for area.  

3. Rotate around the class and wrap up the activity with the desmos learning log.

Practice Activity

This can vary with student activity and your textbook.

G.C.5 Find arc lengths and areas of sectors of circles.
b. Derive the formula for the area of a sector, and use it to solve problems.