Art of Problem Solving
AoPS Online
Math texts, online classes, and more
for students in grades 5-12.
Visit AoPS Online ‚
Books for Grades 5-12 Online Courses
Beast Academy
Engaging math books and online learning
for students ages 6-13.
Visit Beast Academy ‚
Books for Ages 6-13 Beast Academy Online
AoPS Academy
Small live classes for advanced math
and language arts learners in grades 2-12.
Visit AoPS Academy ‚
Find a Physical Campus Visit the Virtual Campus

1969 IMO Problems/Problem 5

Revision as of 11:06, 20 October 2013 by Elvis (talk | contribs) (Created page with "Given n > 4 points in the plane such that no three are collinear. Prove that there are at least ³ n-3 ---- 2 ´ convex quadrilaterals whose vertices are four of the given points.")
(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)

Given n > 4 points in the plane such that no three are collinear. Prove that there are at least ³ n-3 

 2

´ convex quadrilaterals whose vertices are four of the given points.

Retrieved from "https://artofproblemsolving.com/wiki/index.php?title=1969_IMO_Problems/Problem_5&oldid=57350"