Please provide the problem statement clearly, some constructions are not obvious, what is BD and CD? Even the figure is not to scale, that’s an ellipse,not a circle.
Use geogebra or other tools for precise configuration.
Nah, it is necessary to know how they are constructed, otherwise it should be counted as two random segments,
Want> How to solve that?
You must know about tangents to solve this. ( Hint )
Sir, I have a question, don’t mind please. Where do you read in? I would like to know it.
yeah, you wanted to mean CD is a tangent ? But look at the figure, it does not seem to be, the radius of the circle is likely not perpendicular to the tangency point, that’s why description is needed, umm, but no problem. It will be easy with elementary theorems. I actually wanted to mean, you can’t explicitly get a geometry problem with just a random figure excluding any description or any pictorial hints, say for example, a problem says " prove that ABC is isoceles" with a constructive figure and nothing else, then what to do with that if you don’t know how to reach the configuration? Sometimes it is illustrated in figure with pictorial notations , for parallelism or equalism of laterals, angles with defined measure, orthocenter or circumcenter with known points etc. But you shouldn’t expect of getting such a geometry problem during any contest. Hope you feel what I wanted!
Not to mention here, but don’t worry about my knowledge on elementary geometry, have solved many problems of EGMO by evan chen upto chapt 9(projective geometry) excluding bary coord. Like geo is the easiest in math contests, that’s why…
No no. Not for that. I have asked because I know a person named Fattah. I was thinking, you is he. No problem, you haven’t to share it.
yep similar to that
Understood?
Yes or No? Am I wrong?
i guess you are right
Thanks.
Are you a participant of BDMO 2025 National Round?
nah wait <B is not equal to X or C
ummm wait . I have to see
you have to show that <B+<C=180
Okay. Can you give me explanation, why?
or you can show <ABD=<BDC
By <B, you meant <ABD or <ABC