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In the figure ABCD is a square. What is ...

In the figure ABCD is a square. What is angleÁCD and `angle` AOD?

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Each angles of a square is `90^(circ)`. Since. the diagonal bisect the angle `angle ACD=45^(circ)` and `angle AOD=90^(circ)` (centralangle is `1/4` of `360^(circ)` )
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