User:Andrew Kim

Asymptote Test $[asy] size(1.8inch); pair O,A,B,C; O=(0,0); A=(0,sqrt(3)); B=(0,-sqrt(3)); C=(1,0); fill(A--arc(O,sqrt(3),90,270)--cycle,gray(0.7)); fill(A--arc(C,2,120,240)--cycle,gray(1.0)); draw(circle(O,sqrt(3))); draw(circle(C,2)); draw(A--B--C--cycle); dot(O); dot(A); dot(B); dot(C); label("$O$",O,W); label("$A$",A,NNW); label("$B$",B,SSW); label("$C$",C,E); [/asy]$