% Similar triangles
% Copyright (c) Christian Obrecht 2001

box(-4,-5,8.5,5)

A = point(0,0) ; B = point(4,0)
C1 = circle(A,3) ; C2 = circle(B,3.5)

D E intersection(C1,C2)
L = line(E,165:)
E F intersection(L,C1)
G E intersection(L,C2)

color(lightgray)
draw(C1) ; draw(C2)
color(black)
draw(A,B,D)
color(red)
draw(D,F,G)