1999 AMC 8 #14
Source:
June 17, 2011
geometrytrapezoidperimeter
Problem Statement
In trapezoid , the sides and are equal. The perimeter of is [asy]
draw((0,0)--(4,3)--(12,3)--(16,0)--cycle);
draw((4,3)--(4,0),dashed);
draw((3.2,0)--(3.2,.8)--(4,.8));
label("",(0,0),SW);
label("",(4,3),NW);
label("",(12,3),NE);
label("",(16,0),SE);
label("",(8,3),N);
label("",(8,0),S);
label("",(4,1.5),E);[/asy]