# en

## Figures of circular arcs

 Task Determine the surface area A and the perimeter U of this figure. The blue dots respectively mark the center of a circle.

bitte warten

bitte warten

 Note Click inside the bright gray box. It turns turquoise. Enter your solution. You may also use the menu, which is available via rightclick. Complete your input with the RETURN-key. Green: right. Orange: wrong See also: Using the Formel-Applet
 Solution $A=$  1,23a²    (Select the red area to see the solution) $U=$  4,19a    (Select the red area to see the solution)