AJHSME 1991 Problem 10
Source:
June 24, 2011
geometryparallelogram
Problem Statement
The area in square units of the region enclosed by parallelogram is[asy]
unitsize(24);
pair A,B,C,D;
A=(-1,0); B=(0,2); C=(4,2); D=(3,0);
draw(A--B--C--D); draw((0,-1)--(0,3)); draw((-2,0)--(6,0));
draw((-.25,2.75)--(0,3)--(.25,2.75)); draw((5.75,.25)--(6,0)--(5.75,-.25));
dot(origin); dot(A); dot(B); dot(C); dot(D); label("",(0,3),N); label("",(6,0),E);
label("",origin,SE); label("",D,SE); label("",C,NE);
label("",A,SW); label("",B,NW);
[/asy]