1994 AJHSME Problems/Problem 19
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Problem
Around the outside of a 
by square, construct four semicircles (as shown in the figure) with the four sides of the square as their diameters. Another square, 
, has its sides parallel to the corresponding sides of the original square, and each side of is tangent to one of the semicircles. The area of the square is
![[asy] pair A,B,C,D; A = origin; B = (4,0); C = (4,4); D = (0,4); draw(A--B--C--D--cycle); draw(arc((2,1),(1,1),(3,1),CCW)--arc((3,2),(3,1),(3,3),CCW)--arc((2,3),(3,3),(1,3),CCW)--arc((1,2),(1,3),(1,1),CCW)); draw((1,1)--(3,1)--(3,3)--(1,3)--cycle); dot(A); dot(B); dot(C); dot(D); dot((1,1)); dot((3,1)); dot((1,3)); dot((3,3)); label("$A$",A,SW); label("$B$",B,SE); label("$C$",C,NE); label("$D$",D,NW); [/asy]](http://latex.artofproblemsolving.com/1/6/4/1647e4063573eec7bb48f68f685ea124d226c3bb.png)
