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| Math Central | Quandaries & Queries |
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Question from rogerson, a student: its me again... Line t from point P is tangent to circle O at T, the point of tangency. Find the length of PT when the radius of the circle is 5cm and the distance between points P and O is 8cm. please.... |
Hi there. If I read your question as you intended it, then this diagram is correct:
I have drawn a line from O to T. What is it? the radius. Therefore you know its length.
Now you have a triangle with two sides known. Is it a right triangle? Then you can use Pythagoras to solve the problem right?
Hope this helps,
Stephen La Rocque.
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