7. If a circle is inscribed
in a quadrilateral, prove
that sum of pair of opposite
sides is equal to the
sum of the other pair.
8. Prove that the argie
between the two tangents
drawn from any external
point to a circle is
supplementary to the angle
subtended by the line
segments forming by
the joining of points of
contact to the centre.
9. Find the length of a
tangent drawn to a circle
with radius 5 cm, from a
point
13 cm away from
centre of circle.
.
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