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Theorem of Equal Chords Subtending Equal Angles at the Center

In the given ...

Question

In the given figure, 𝐀𝐁𝐂𝐃 is a cyclic quadrilateral in which 𝐀𝐁∥𝐃𝐂. If ∠𝐁𝐀𝐃 =𝟏𝟎𝟎°, find ∠𝐀𝐁𝐂.

A

100°

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B

120°

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C

110°

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D

80°

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Solution

The correct option is A 100°

100°

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