(a) Ratio of number of triangles to that of circles\( =\frac{ 3}{2}\)\(= 3:2\)
(b) Ratio of number of squares to all figures \(= \frac{2}{7}\)\(= 2:7\)
(c) Ratio of number of circles to all figures \(= \frac{2}{7}\)\(= 2:7\)