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Two concentric circles have diameters of 3 centimeters,and 8 centimeters,respectively. A point P lies inside one circle and outside the other. if p is equivalentfrom both circles,at what distance is it from the center of the circles?
 Oct 30, 2013

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5.5cm

just draw the circles like a flat donut.

the radius of the little one is 3cm and the big one is 8cm. This means that there is 5cm between the 2 circles.

If P is equistant from the two cirles it must be 2.5cm from each.

so it will be 3+2.5 = 5.5cm from the centre.

You need to draw the picture to see what I am talking about.
 Oct 31, 2013

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