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Question

In quadrilateral ACBD, AC=AD and AB bisects A(see Fig). Show that ABCABD. What can you say about BC and BD?
1051873_b0eb937ef9714c3cb026c2102670d8a4.png

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Solution

InΔABCandΔABD

AC=AD(given)

CAB=DAB(given)

AC=AB(common)

So, ΔABCΔABD(bySAScriterion)

Now, ΔABCΔABD

BC=BD(byc.p.c.t)

Therefore BC and BD are equal


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