Cirkelns area

Explore the formula for the area of a circle, by cutting it into sectors and rearranging the sectors to form a figure close to a parallelogram. By increasing the no. of sectors, students observe that the figure tends to a rectangle and get the formula for the area of the circle by finding the area of this rectangle. See also how I design the applets in http://www.geogebratube.org/material/show/id/15215.                                        Anthony Or. Education Bureau, Hong Kong.                                        orchiming@gmail.com (繁體中文版:http://www.geogebratube.org/material/show/id/550)

 

aklejan62

 
Resource Type
Activity
Tags
area  calculus  circle  circumference  integral  integration  limit  proof  sector 
Target Group (Age)
11 – 14
Language
Swedish / Svenska‎
 
 
GeoGebra version
4.0
Views
1913
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