Area of Circles

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. GeoGebra Institute of Hong Kong.                                        orchiming@gmail.com (繁體中文版:http://www.geogebratube.org/material/show/id/550)

 

Anthony OR 柯志明

 
Tipus de material
Construcció dinàmica
Etiquetes
area  circle  circumference  exploration  perimeter  pi 
Grup de destinació (edats)
11 – 14
Idioma
English (United Kingdom)
 
 
Llicència
CC-BY-SA, GeoGebra Terms of Use
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