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How can you draw the tangent to a circle at a given point when the centre of the circle is not known?

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Steps of Construction: 

1. Take a point P and draw a chord PR through P. 

2. Construct ∠PRQ and measure it. 

3. Construct ∠QPX at P equal to ∠PRQ. 

4. Extend PX on other side. XY is the required tangent at P. 

Note: Angle between a tangent and chord is equal to angle in the alternate segment.

Hint: Draw equal angles ∠QPX and ∠PRQ. Explain the construction.

Steps of construction: 

1. Draw any two chords AB and AC in the given circle. 

2. Draw the perpendicular bisectors to AB and AC, they meet at the centre of the circle. 

3. Tet O be the centre, join OP. 

4. Draw a perpendicular to OP at P and extend it on either sides which forms a tangent to the circle at ‘P’.

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