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Vorlage:Kurzinfo-2

Figures of circular arcs

Stift.gif   Task

Three equally big coins are lying on a table in a way that each one is touching the two others. Calculate the perimeter U and the surface area A of the figure between the three coins as a function of the coins' radius.

SkizzeMünzaufgabe.jpg

bitte warten



bitte warten





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See also: Using the Formel-Applet

Information icon.svg Solution

U=   r*π    (Select the red area to see the solution)

A=  (r^2)*sqrt(3)-0,5*r^2*π    (Select the red area to see the solution)