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harsh

· started a discussion

· 1 Months ago

doubt (Question: 188050.0 )

is the above quad a cyclic one?? please anyone tell

Question:

In the above figure, AB is the diameter of the circle, C and D lie on the semicircle. 

\(\angle \)ABC = 65° and \(\angle \)CAD = 45°, find \(\angle \)DCA = ?

Options:
A) 45°
B) 25°
C) 20°
D) None of these
Solution:
Ans: (c)


Sushil Punia

· commented

· 1 Months ago

yes it is and using that property of opposite angles sum=180, angle D comes out to be 115.
115+45=160,remaining angle=180-160=20
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