# question from Circle

• Mar 31st 2010, 11:33 PM
banku12
question from Circle
$\textup{The chord of contact of tangents from a point P to a circle passes through Q.}$
$\textup{If 3 and 4 are the lenghts of tangents to the circle then length of PQ is???}$
• Apr 1st 2010, 04:34 AM
bjhopper
question from circle
Quote:

Originally Posted by banku12
$\textup{The chord of contact of tangents from a point P to a circle passes through Q.}$
$\textup{If 3 and 4 are the lenghts of tangents to the circle then length of PQ is???}$

The tangents to a circle from a point outside the circle are equal so you need to rewrite your problem

bjh
• Apr 1st 2010, 06:21 AM
nolanfan
Also the radius of the circle is required to calculate the length of PQ.
• Apr 1st 2010, 07:15 AM
earboth
Quote:

Originally Posted by banku12
$\textup{The chord of contact of tangents from a point P to a circle passes through Q.}$
$\textup{If 3 and 4 are the lenghts of tangents to the circle then length of PQ is???}$

Do you mean something like this: