## Search found 57 matches

Thu Jan 31, 2019 7:52 am
Forum: Junior Level
Topic: কোণে‌‌র মান
Replies: 8
Views: 6516

### Re: কোণে‌‌র মান

There is something called Google.
Wed Jan 30, 2019 9:05 pm
Forum: Junior Level
Topic: কোণে‌‌র মান
Replies: 8
Views: 6516

### Re: কোণে‌‌র মান

The above solution is wrong. Isolate $\bigtriangleup ABC$ from the parallelogram $ABCD$.Your task is finding $\angle CPQ$.Now,notice that this problem has completely been reduced to the famous langley's adventetious angles.So,it follows that $\angle CPQ=70^{\circ}$.And finally your desired answers a...
Tue Jan 08, 2019 4:19 pm
Forum: News / Announcements
Topic: MPMS Problem Solving Marathon
Replies: 11
Views: 9912

### Re: MPMS Problem Solving Marathon

Produce $DA$ upto $E$ such that $AE=BC$.It follows that $AEBC$ is a parallelogram.So,$BE=AC=BD=d$.By Stewart's theorem on $\bigtriangleup BED,d^2b+d^2c=m(a^2+bc)$ where $m=b+c$.Cancelling $b+c=m$ from both sides we finally have $d^2=a^2+bc$.
Sat Mar 03, 2018 5:11 pm
Forum: National Math Olympiad (BdMO)
Topic: BdMO National Secondary 2006/10
Replies: 5
Views: 2144