Difference between revisions of "2010 AMC 8 Problems/Problem 23"

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-[asy2]
-import graph; size(7.5cm); real lsf=0.5; pen dps=linewidth(0.7)+fontsize(10); defaultpen(dps); pen ds=black; real xmin=-6.27,xmax=10.01,ymin=-5.65,ymax=10.98; draw(circle((0,0),2)); draw((-3,0)--(3,0),EndArrow(6)); draw((0,-3)--(0,3),EndArrow(6)); draw(shift((0.01,1.42))*xscale(1.41)*yscale(1.41)*arc((0,0),1,179.76,359.76)); draw(shift((-0.01,-1.42))*xscale(1.41)*yscale(1.41)*arc((0,0),1,-0.38,179.62)); draw((-1.4,1.43)--(1.41,1.41)); draw((-1.42,-1.41)--(1.4,-1.42)); label("<math> P(-1,1) </math>",(-2.57,2.17),SE*lsf); label("<math> Q(1,1) </math>",(1.55,2.21),SE*lsf); label("<math> R(-1,1) </math>",(-2.72,-1.45),SE*lsf); label("<math>S(1,-1)</math>",(1.59,-1.49),SE*lsf);
-dot((0,0),ds); label("<math>O</math>",(-0.24,-0.35),NE*lsf); dot((1.41,1.41),ds); dot((-1.4,1.43),ds); dot((1.4,-1.42),ds); dot((-1.42,-1.41),ds);
-clip((xmin,ymin)--(xmin,ymax)--(xmax,ymax)--(xmax,ymin)--cycle);[/asy2]

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