Search found 7 matches

by abrarfiaz
Mon Feb 05, 2018 7:54 pm
Forum: News / Announcements
Topic: geometry(iranian geometry olympiad 2017)
Replies: 4
Views: 117

Re: geometry(iranian geometry olympiad 2017)

I am being unable of understanding the main concept of the problem. Truly to say ,can't understand the problem. I would be grateful if you do help me
by abrarfiaz
Sun Jan 28, 2018 11:03 pm
Forum: Junior Level
Topic: problem 5 (elementary) Iranian geometry Olympiad 2017
Replies: 3
Views: 102

problem 5 (elementary) Iranian geometry Olympiad 2017

In the isosceles triangle ABC (AB = AC), let l be a line parallel to BC through A. Let D be an arbitrary point on l. Let E, F be the feet of perpendiculars through A to BD, CD respectively. Suppose that P, Q are the images of E, F on l. Prove that AP + AQ ≤ AB.


please help me solving the problem
by abrarfiaz
Sun Jan 28, 2018 10:59 pm
Forum: News / Announcements
Topic: geometry(iranian geometry olympiad 2017)
Replies: 4
Views: 117

geometry(iranian geometry olympiad 2017)

4. P1,P2,...,P100 are 100 points on the plane, no three of them are collinear. For each three points, call their triangle clockwise if the increasing order of them is in clockwise order. Can the number of clockwise triangles be exactly 2017?


help me solving the problem
by abrarfiaz
Sat Nov 18, 2017 8:02 pm
Forum: Junior Level
Topic: BDMO 2016: National Junior/2
Replies: 4
Views: 622

Re: BDMO 2016: National Junior/2

can u explain please?
by abrarfiaz
Sat Nov 18, 2017 7:52 pm
Forum: Junior: Solved
Topic: Dhaka Junior 2011/5
Replies: 5
Views: 1347

Re: Dhaka Junior 2011/5

surjo wrote:I did not get it. 9*9=81 should be palindromic numbers


mate it will be 9 * 10
by abrarfiaz
Sat Nov 18, 2017 7:50 pm
Forum: Junior: Solved
Topic: Dhaka Junior 2011/5
Replies: 5
Views: 1347

Re: Dhaka Junior 2011/5

it will be 90
by abrarfiaz
Thu Oct 12, 2017 11:41 am
Forum: Junior Level
Topic: BDMO 2016: National Junior/2
Replies: 4
Views: 622

Re: BDMO 2016: National Junior/2

explain the process please