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Draw a circle of radius 3 cm. Take two points P and Q on one of its extended diameter each at a distance of 7 cm from its centre. Draw tangents to the circle from these two points P and Q.
A circle of radius 3 cm. Take two points P and Q on one of its extended diameter each at a distance of 7 cm from its centre.
We have to draw a circle of radius 3 cm and draw tangents to the circle from the points P and Q.
Steps of construction:
(i) Draw a circle with centre $O$ and radius $3\ cm$.
(ii) Draw a diameter and produce it to both sides.
(iii) Take two points $P$ and $Q$ on this diameter with a distance of $7\ cm$ each from the centre $O$.
(iv) Bisect $PO$ at $M$ and $QO$ at $N$.
(v) With centres $M$ and $N$, draw circle on $PO$ and $QO$ as diameter which intersect the given circle at $S, T$ and $S’, T’$ respectively.
(vi) Join $PS, PT, QS’$ and $QT’$.
$PS, PT, QS’$ and $QT’$ are the required tangents to the given circle.
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