Area of the white portion of help sign
Source: 1993 AMC 8 Problem 13
June 28, 2011
geometryAMC
Problem Statement
The word "'''HELP'''" in block letters is painted in black with strokes unit wide on a by rectangular white sign with dimensions as shown. The area of the white portion of the sign, in square units, is[asy]
unitsize(12);
fill((0,0)--(0,5)--(1,5)--(1,3)--(2,3)--(2,5)--(3,5)--(3,0)--(2,0)--(2,2)--(1,2)--(1,0)--cycle,black);
fill((4,0)--(4,5)--(7,5)--(7,4)--(5,4)--(5,3)--(7,3)--(7,2)--(5,2)--(5,1)--(7,1)--(7,0)--cycle,black);
fill((8,0)--(8,5)--(9,5)--(9,1)--(11,1)--(11,0)--cycle,black);
fill((12,0)--(12,5)--(15,5)--(15,2)--(13,2)--(13,0)--cycle,black);
fill((13,3)--(14,3)--(14,4)--(13,4)--cycle,white);
draw((0,0)--(15,0)--(15,5)--(0,5)--cycle);
label("5\left\{ \begin{tabular}{c} \\ \\ \\ \\ \end{tabular}\right.",(1,2.5),W);
label(rotate(90)*"",(0.5,0.1),S);
label("",(0.5,-0.6),S);
label(rotate(90)*"",(3.5,0.1),S);
label("",(3.5,-0.6),S);
label(rotate(90)*"",(7.5,0.1),S);
label("",(7.5,-0.6),S);
label(rotate(90)*"",(11.5,0.1),S);
label("",(11.5,-0.6),S);
label(rotate(270)*"\left\{ \begin{tabular}{c} \\ \\ \end{tabular}\right.",(1.5,4),N);
label("",(1.5,5.8),N);
label(rotate(270)*"\left\{ \begin{tabular}{c} \\ \\ \end{tabular}\right.",(5.5,4),N);
label("",(5.5,5.8),N);
label(rotate(270)*"\left\{ \begin{tabular}{c} \\ \\ \end{tabular}\right.",(9.5,4),N);
label("",(9.5,5.8),N);
label(rotate(270)*"\left\{ \begin{tabular}{c} \\ \\ \end{tabular}\right.",(13.5,4),N);
label("",(13.5,5.8),N);
label("\left. \begin{tabular}{c} \\ \end{tabular}\right\} 2",(14,1),E);
[/asy]