maths --plse help me..

a circle enclose a rectangle of side 6cm and 8cm. what is the perimeter of the circle?

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1. Draw perpendicular lines through the middle of the rectangle. Also draw a line from the center of the circle a corner of the rectangle. Notice the 3-4-5 triangle, with 5 cm being the radius of the triangle.
The circle perimeter is 10 pi

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