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Question

In the figure, DAAB, CBAB and AC=BD. State the three pairs of equal parts in ΔABC and ΔDAB. Which of the following statements is meaningful?
(i) ΔABC ≅ ΔBAD (ii) ΔABC ≅ ΔABD


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Solution

The three pairs of equal parts are:
∠ABC = ∠BAD (= 90°)
AC = BD (Given)
AB = BA (Common side)

From the above, ΔABC ≅ ΔBAD (By RHS congruence rule).
So, statement (i) is true.
Statement (ii) is not meaningful, in the sense that the correspondence among the vertices
is not satisfied.

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