hi mam please tell me how to find area

Dear student, Area can be calculated for square, rectangle. triangle, circle, etc. Kindly be more clear so that we can help you provide the correct solution. 
Few ways to calculate area is:
Area of Circle= ${\mathrm{\pi r}}^2$ ( r=radius)
Area of square= $s^{2 }$( s=side)

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forward to hear from you again!
Regards

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