How to calculate this area. Please see the picture

[mahdt007]

 

[lev888]

Circle Sector and Segment

www.mathsisfun.com

Area given segment height: https://www.mathopenref.com/segmentareaht.html

 

[Deleted member 4993]

View attachment 29658

Please show us what you have tried and exactly where you are stuck.

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Please share your work/thoughts about this problem.

 

[mahdt007]

Thank you so much. The problem looks simple, but the solution is not! Never find it by myself