Rectangle DEFA below is a 3×4 rectangle with DC=CB=BA. The area of the "bat wings" is
[asy]
size(180);
defaultpen(fontsize(11pt));
draw((0,0)--(3,0)--(3,4)--(0,4)--(0,0)--(2,4)--(3,0));
draw((3,0)--(1,4)--(0,0));
fill((0,0)--(1,4)--(1.5,3)--cycle, black);
fill((3,0)--(2,4)--(1.5,3)--cycle, black);
label("D",(0,4),NW);
label("C",(1,4),N);
label("B",(2,4),N);
label("A",(3,4),NE);
label("E",(0,0),SW);
label("F",(3,0),SE);[/asy]
<spanclass=′latex−bold′>(A)</span>2<spanclass=′latex−bold′>(B)</span>221<spanclass=′latex−bold′>(C)</span>3<spanclass=′latex−bold′>(D)</span>321<spanclass=′latex−bold′>(E)</span>5 AMC 8geometryrectangle2016 AMC 8