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Question

In the following figure, what can be concluded from the given conditions.

Given: AB = CD and AC = DE.


A

AC = BD,

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B

AOC = BOD.

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C

AOB = COD

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D

All of the above.

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Solution

The correct option is D

All of the above.


Given that chords AB and CD are equal.

Therefore, the angles subtended by them at the centre are also equal.

AOB = COD

We can write AOB = AOC + COB _________1

Similarly we can write COD = COB + BOD ________2

From (1) and (2)

AOB = COD

AOC + COB = COB + BOD

Therefore, AOC = BOD

Therefore using converse of theorem, we get AC = BD.

Hence all the three given options are correct.


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