9. In the following figure, AD = BC and
BD = CA.
Prove that:
(i) ZADB = ZBCA
(ii) ZDAB = ZCBA
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Answer:
(i) .. AB=BC
Angle ADB=BCA
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(1) In triangle ADB = angel BCA,
ANGEL A = ANGEL C (ALTERNATE ANGEL)
DB = CA (GIVEN)
DA =BC (GIVEN)
L.H.S. = R.H.S.
PROVED THAT ANGEL ADB=BCA(BY S.A.S CONGRUENCY).
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