question no. 11 and 12
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Question no.12:-
we know that the length drawn from external point to a circle are equal.
AP=AS -------(1)
BP=BQ -------(2)
CR =CQ -------(3)
DR=DS -------(4)
Adding eq. 1,2,3,&4
AP+BP+CR+DR = AS+BQ+CQ+DS
(AP+BP)+(CR+DR) =(AS+DS)+(BQ+CQ)
AB+CD=AD+BC
Hence proved.
hope it helps you
we know that the length drawn from external point to a circle are equal.
AP=AS -------(1)
BP=BQ -------(2)
CR =CQ -------(3)
DR=DS -------(4)
Adding eq. 1,2,3,&4
AP+BP+CR+DR = AS+BQ+CQ+DS
(AP+BP)+(CR+DR) =(AS+DS)+(BQ+CQ)
AB+CD=AD+BC
Hence proved.
hope it helps you
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