Math Help Forum - View Single Post - Distance from a point to the center of a circle

Shyam · #2 May 17th, 2009, 08:32 PM

Quote:

Originally Posted by Mel

The length of tangent segment PA drawn from the exterior point P to circle O is 24. If the radius of the circle is 7, find the distance from point P to the center of the circle.

Use Pythagorean Theorem,

$PO^2=PA^2+AO^2$

$PO^2=(24)^2+(7)^2$

$PO^2=576+49=625$

$PO=25$

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