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

 
Materialetype
Arbejdsark
Tags
area  circle  circumference  exploration  perimeter  pi 
Målgruppe (alder)
11 – 14
Sprog
English (United Kingdom)
 
 
Licens
CC-BY-SA, GeoGebra Terms of Use
Variationer af materialet
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Vis mere…
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Delt af Ισίδωρος Γλαβάς
Copy of Area of Circles
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Delt af Joseph Kim
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Delt af Joseph Kim
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Delt af Irina Vasilescu
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Delt af Meghan Averill
Explore the Area of a Circle
Delt af Anthony OR 柯志明
Flächeninhalt eines Kreises
Delt af Barbara Lichtenegger
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Delt af Bianca
Área do Círculo
Delt af Aline Lemmertz
Observe a fórmula do comprimento da circunferência.
Delt af Aline Lemmertz
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Delt af Ισίδωρος Γλαβάς
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Delt af Jens L. Lassen
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Delt af Laura Santos
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By exploring the activity below you can find the formula of the area of a circle.
Delt af Aleyda Medina
Area of Circles
Delt af Jefferson Huera
Keliling dan Luas Lingkaran
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Area of Circles
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Area of Circles
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Unavngiven Applet
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Delt af Sandra Krauze
Copy of Area of Circles
Delt af Sonya White
Area of Circles
Delt af Jacob Orner
Area of Circles
Delt af Jack Lin
Area of Circle as Parallelogram
Delt af Gregory Belostotski
Area of Circles
Delt af Hurták Éva
Area of Circles
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Unavngiven Applet
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Demo - Area of Circles
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Unavngiven Applet
Delt af Monika Musilek
Area of Circles by Anthony Or with questions added
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Area of Circles
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Unavngiven Applet
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Area of Circles
Delt af Martin
Cópia de Area of Circles
Delt af JOSÉ ANTÔNIO DA SILVA ANDRADE
Área de un círculo
Delt af Ruben González Míguez
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Copy of Area of Circles
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Delt af v_hofmann
Unavngiven Applet
Delt af Kika Georgiou
 
 
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