Catch it
In the above figure, 2 straight lines AD and BE intersect at point C.
XY is also a straight line passing through C. ABC is a triangle with sides AB,BC,CA.
If a circle is circumscribed on triangle ABC with points A,B,C on the circumcircle,find the value of ?
The answer is 40.
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1 solution
We can simply use Alternate segment theorem.