Changes

#Using the tangent properties students have to show AQ=BQ and ∠APB=90°

#Using the tangent properties students have to show AQ=BQ and ∠APB=90°

==Concepts used==

==Concepts used==

#The tangent drawn from an external point to a circle <br> a) are equal <br> b] subtend equal  angle at the center <br> c] are equally inclined to the line joining the center and external point.

#The tangent drawn from an external point to a circle <br> a) are equal <br> b] subtend equal  angle at the center <br> c] are equally inclined to the line joining the center and external point.

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#Angle subtended by equal sides are equal.