MathDB
AJHSME 1991 Problem 10

Source:

June 24, 2011
geometryparallelogram

Problem Statement

The area in square units of the region enclosed by parallelogram ABCDABCD 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("yy",(0,3),N); label("xx",(6,0),E); label("(0,0)(0,0)",origin,SE); label("D(3,0)D (3,0)",D,SE); label("C(4,2)C (4,2)",C,NE); label("AA",A,SW); label("BB",B,NW); [/asy]
(A) 6(B) 8(C) 12(D) 15(E) 18\text{(A)}\ 6 \qquad \text{(B)}\ 8 \qquad \text{(C)}\ 12 \qquad \text{(D)}\ 15 \qquad \text{(E)}\ 18