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Draw a line segment AB of length 8 cm. Taking A as centre, draw a circle of radius 4 cm and taking B as centre, draw another circle of radius 3 cm. Construct tangents to each circle from the centre of the other circle.
Given:
A line segment AB of length 8 cm. Take two points P and Q on one of its extended diameter each at a distance of 7 cm from its centre.
To do:
We have to draw a line segment AB of length 8 cm. Taking A as centre, draw a circle of radius 4 cm and taking B as centre, draw another circle of radius 3 cm. Construct tangents to each circle from the centre of the other circle.
Solution:
Steps of construction:
(i) Draw a line segment $AB = 8\ cm$.
(ii) With centre $A$ and radius $4\ cm$ and with centre $B$ and radius $3\ cm$, draw circles.
(iii) Bisect $AB$ at $M$.
(iv) With centre $M$ and diameter $AB$, draw a circle which intersects the two circles at $S’, T’$ and $S, T$ respectively.
(v) Join $AS, AT, BS’$ and $BT’$.
$AS, AT, BS’$ and $BT’$ are the required tangents.
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