Draw a circle of radius 4 cm with centre O. draw a diameter POQ. through P draw a tangent to the circle.



Step 1: Take a point O on the plane of the paper and draw a circle of radius OP = 4 cm.


Step 2: extend PO , let it cuts the circle at point Q. POQ is the diameter.


Step 3: Construct ∠QPT = 90°. extend TP.



Here, T'PT is the required tangent to the circle at P.  (Radius is perpendicular to the tangent at point of contact)

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