CK12 - Geometry

a. How far doespoint travelin one hour?

Answers

1.

2. 
   

   inches

   
   


3. 
   

a. inches

b. Approximately times

4. 
   

   cm

   
   


5. 
   

   Approximately feet

   
   


6. 
   

   Approximately inches

   
   


7. 
   

   Approximately

   
   


8. 
   

a.

b. Approximately miles

9. or equivalent

10.

Circlesand Sectors

LearningObjectives

• Calculatethe area of a circle.


• Calculatethe area of a sector.


• Expandunderstandingof the limit concept.

Introduction

In this lessonwe completeour area toolboxwith formulasfor the areasof circlesand sectors.We’ll start
with areasof regularpolygons,and workour way to the limit, whichis the area of a circle.This may sound
familiar;it’s exactlythe sameapproachwe usedto developthe formulafor thecircumferenceof a circle.

Areaof a Circle

The big idea: