MathDB

Putnam 1977 B2

Source:

April 7, 2022

college contests

Problem Statement

Given a convex quadrilateral

ABCD

and a point

O

not in the plane

ABCD

, locate point

A'

on line

OA,

point

B'

on the line

A'B'C'D'

, point

C'

on line

OC,

and point

D'

on line

OD

so that

A'B'C'D'

is a parallelogram.

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