Asked by  | 30th Jan, 2009, 10:41: PM

Expert Answer:

1. Draw a circle of radius 3cm.

2. Take a chord PQ on it.

3. Take any point R on the circle.

4. Join PR and QR.

5. Now take  and arc = PRP taking as a centre.

6. Extend PT.

PT is the tangent to the circle.

Or else another alternate method could be:


1. First locate the centre of the circle by taking two non parallel chords and finding its point of intersection.

2. Join PO and bisect it. Let M be the mid point of PO.

3. Taking M as a centre and MO radius draw a circle. Let it intersect the circle at Q & R.

4. Join PQ & PR

PQ & PR are the required two tangents



Answered by  | 31st Jan, 2009, 02:42: PM

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