Let
x--------> the number of rectangles in the drawing
y--------> the number of circles in the drawing
r--------> ratio of rectangles to circles
we know that


Drawing N 1
see the attached figure N 1
we have
the number of rectangles is equal to


the number of circles is equal to


Find the ratio

Drawing N 2
see the attached figure N 2
we have
the number of rectangles is equal to


the number of circles is equal to


Find the ratio

Drawing N 3
see the attached figure N 3
we have
the number of rectangles is equal to


the number of circles is equal to


Find the ratio
