Search found 2 matches

by marek12
Fri Apr 12, 2019 11:50 pm
Forum: National Math Olympiad (BdMO)
Topic: BdMO-2014 circled pentagon
Replies: 2
Views: 439

Re: BdMO-2014 circled pentagon

Yes, but i think is something wrong with it :?
by marek12
Fri Mar 29, 2019 11:07 am
Forum: National Math Olympiad (BdMO)
Topic: BdMO-2014 circled pentagon
Replies: 2
Views: 439

BdMO-2014 circled pentagon

$ABCDE$ is a circled pentagon. $AC= 2$, $AD= 3$, $BD=5$, $BE =1$ and $CD/DE = 10/3$, $BC/CE = a/b$ (where $a$ and $b$ are coprime) How to find the value $a-b$?


|AB| < |AC| ... so |AD| + |AB| < |AD| + |AC| = 2 + 3 = 5 = |BD| so is there a triangle ΔABD?