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Date Name Thumbnail Size Description Versions
19:12, 16 November 2007 AIME 1991 Solution 14.png (file) 9 KB defaultpen(fontsize(8)); pair A=expi(-pi/2-acos(475/486)), B=expi(-pi/2+acos(475/486)), C=expi(-pi/2+acos(475/486)+acos(7/18)), D=expi(-pi/2+acos(475/486)+2*acos(7/18)), E=expi(-pi/2+acos(475/486)+3*acos(7/18)), F=expi(-pi/2-acos(475/486)-acos(7/18)); dra 1
14:22, 13 November 2007 AIME 1992 Solution 10.png (file) 6 KB defaultpen(fontsize(8)); path kt = arc((20,0),20,0,90)..arc((0,20),20,0,90)--(40,40)--cycle; fill(kt,gray); draw((0,-30)--(0,50));draw((-30,0)--(50,0)); draw(circle((20,0),20));draw(circle((0,20),20)); draw((40,0)--(40,40)--(0,40)); label("$a$",(50,0),(2, 1
19:27, 11 November 2007 AIME 1996 Problem 01.png (file) 1 KB   1
19:16, 11 November 2007 AIME 1988 Problem 12.png (file) 3 KB   1
19:11, 11 November 2007 AIME 1988 Problem 06.png (file) 938 bytes   1
21:09, 9 November 2007 Aime2006-2-11.JPG (file) 9 KB   1
21:02, 9 November 2007 AIME 2005II Solution 12 1.png (file) 4 KB defaultpen(fontsize(8)); pair A=(0,9), B=(9,9), C=(9,0), D=(0,0), E=(2.5-0.5*sqrt(7),9), F=(6.5-0.5*sqrt(7),9), G=(4.5,9), O=(4.5,4.5); draw(A--B--C--D--A);draw(E--O--F);draw(G--O); dot(A^^B^^C^^D^^E^^F^^G^^O); label("A",A,(-1,1));label("B",B,(1,1));label 1
20:46, 9 November 2007 AIME 2005I Solution 7 2.png (file) 5 KB defaultpen(fontsize(8)); pair A=(0,0), B=(9+sqrt(141),0), C=(5+sqrt(141),4*sqrt(3)), D=(5,5*sqrt(3)), E=((9+sqrt(141))/2,(9+sqrt(141))/2*sqrt(3)); draw(A--B--C--D--A);draw(D--E--C); dot(A^^B^^C^^D^^E); label("A",A,(-1,-1));label("B",B,(1,-1));label("C",C, 1
20:26, 9 November 2007 AIME 2005I Solution 7 1.png (file) 4 KB defaultpen(fontsize(8)); pair A=(0,0), B=(9+sqrt(141),0), C=(5+sqrt(141),4*sqrt(3)), D=(5,5*sqrt(3)), E=(5,0), F=(5+sqrt(141),0), G=(5,4*sqrt(3)); draw(A--B--C--D--A);draw(D--E);draw(C--F);draw(G--C); dot(A^^B^^C^^D^^E^^F^^G); label("A",A,(-1,-1));label(" 1
18:28, 8 November 2007 AMC12 2006A 19.png (file) 5 KB defaultpen(fontsize(6)); draw(circle((2,4),4));draw(circle((14,9),9)); draw((0,-2)--(0,20));draw((-6,0)--(25,0)); draw((2,4)--(2,4)+4*expi(pi*4.5/11)); draw((14,9)--(14,9)+9*expi(pi*6/7)); label("4",(2,4)+2*expi(pi*4.5/11),(-1,0)); label("9",(14,9)+4.5*ex 1
18:11, 8 November 2007 AMC12 2006A 17.png (file) 5 KB defaultpen(fontsize(10)); pair A=(0,3), B=(0,0), C=(3,0), D=(3,3), E=(3+5/3/sqrt(2),3+5/3/sqrt(2)), F; F=A+sqrt(9+5*sqrt(2))*expi(atan(5/(3*sqrt(2))/(3+(5/3/sqrt(2))))+atan(5/(3*sqrt(9+5*sqrt(2))))); draw(A--B--C--D--A);draw(A--F);draw(circle(E,5/3)); dot 1
19:37, 3 November 2007 AIME 2002I Problem 02.png (file) 11 KB   1
19:35, 3 November 2007 AIME 2002I Problem 10.png (file) 6 KB   1
19:29, 3 November 2007 AIME 1999 Solution 15 1.png (file) 5 KB defaultpen(fontsize(8)); pair A=(0,0), B=(16,24), C=(34,0), P=(8,12), Q=(25,12), R=(17,0); draw(A--B--C--A);draw(P--Q--R--P); draw(A--foot(A,B,C));draw(B--foot(B,A,C));draw(C--foot(C,A,B)); label("A",A,SW);label("B",B,NW);label("C",C,SE); label("P",P,NW); 4
19:10, 3 November 2007 AIME 1999 Solution 15 2.png (file) 4 KB import three; currentprojection=orthographic(1/2,-1,1/2); triple A=(0,0,0), B=(16,24,0), C=(34,0,0), P=(8,12,0), Q=(25,12,0), R=(17,0,0), S=(16,12,12); draw(A--B--C--A); draw(P--Q--R--P); draw(S--P..S--Q..S--R); draw(S--(16,12,0)); 1
18:34, 3 November 2007 AIME 1991 Solution 04.png (file) 8 KB size(225,150,IgnoreAspect); defaultpen(fontsize(8)); real f(real x) {return log(x)/log(2)/5;} real g(real x) {return sin(5*pi*x);} pair F(real x) {return (x,f(x));} xaxis("$x$",LeftTicks); yaxis("$y$",ymax=2); draw(graph(f,0.00002,3),red);draw(graph(g,0.0 1
18:10, 3 November 2007 AIME 1991 Solution 12.png (file) 5 KB defaultpen(fontsize(8)); pair A=(0,28.8), B=(38.4,28.8), C=(38.4,0), D=(0,0), O, P=(23.4,28.8), Q=(38.4,8.8), R=(15,0), S=(0,20); O=intersectionpoint(A--C,B--D); draw(A--B--C--D--cycle);draw(P--R..Q--S); draw(P--Q--R--S--cycle); label("A",A,NW);label("B", 2
17:43, 3 November 2007 AIME 1988 Solution 07.png (file) 3 KB defaultpen(fontsize(8)); pair A=(3,11), B=(20,0), C=(0,0), D=(3,0); draw(A--B--C--cycle); draw(A--foot(A,B,C)); label("A",A,NW);label("B",B,SE);label("C",C,SW);label("D",D,SE); label("$h$",A/2+D/2,E);label("$3$",D/2,S);label("$17$",B/2+D/2,S); 1
17:28, 3 November 2007 Excircle-1.png (file) 15 KB pair A=(0,0), B=(5,4), C=(6,0), I, X1, Y1, X2, Y2, X3, Y3, P1, F1, P2, F2, P3, F3; draw(A--B--C--cycle); X1=expi((angle(B-A)+angle(C-B))/2); Y1=expi((angle(C-A)+angle(B-C))/2); P1=intersectionpoint(B--10*X1+B, C--10*Y1+C);F1=foot(P1, B, C); draw(circle(P1 1
20:48, 15 October 2007 AMC10 2004A 20.png (file) 3 KB   1
20:42, 15 October 2007 AMC10 2004A 23.png (file) 8 KB   1
20:35, 15 October 2007 AMC10 2004A 22.png (file) 3 KB   1
20:29, 15 October 2007 AMC10 2004A 21.png (file) 9 KB   1
20:12, 15 October 2007 AMC10 2004A 9.gif (file) 2 KB   1
20:03, 15 October 2007 AMC10 2004A 4.gif (file) 958 bytes   1
13:11, 6 October 2007 AIME 1986 Problem 14 sol.png (file) 11 KB   1
22:43, 28 March 2007 AIME 1994 Problem 14.png (file) 5 KB   1
23:13, 25 March 2007 AIME 1993 Problem 9.png (file) 698 bytes   1
21:39, 10 March 2007 AIME 1992 Problem 12.png (file) 2 KB   1
01:34, 2 March 2007 AIME 1991 Problem 11.gif (file) 5 KB   1
00:45, 2 March 2007 AIME 1990 Problem 14.png (file) 2 KB   1
22:29, 24 February 2007 AIME 1989 Problem 15.png (file) 7 KB   1
22:18, 24 February 2007 AIME 1989 Problem 12.png (file) 9 KB   1
22:00, 24 February 2007 AIME 1989 Problem 6.png (file) 3 KB   1
00:08, 11 February 2007 AIME 1987 Problem 15.png (file) 1 KB   1
23:51, 10 February 2007 AIME 1987 Problem 9.png (file) 1 KB   1
23:43, 10 February 2007 AIME 1987 Problem 6.png (file) 2 KB   1
00:44, 22 January 2007 AIME 1999 Problem 4.png (file) 7 KB   1
00:20, 22 January 2007 AIME 1995 Problem 9.png (file) 4 KB   1
20:49, 21 January 2007 AIME 1995 Problem 1.png (file) 4 KB   1
01:30, 21 January 2007 AIME 1985 Problem 15.png (file) 3 KB   1
01:20, 21 January 2007 AIME 1985 Problem 6.png (file) 2 KB   1
01:09, 21 January 2007 AIME 1985 Problem 4.png (file) 5 KB   1