Consider the squares and circles shown. Which describes a ratio for these shapes? Select all.
a. The ratio of squares to circles is \( 1 : 2 \) .
b. The ratio of circles to total shapes is \( 1 \) to \( 3 \) .
c. The ratio of squares to total shapes is \( 3 \) to \( 2 \) .
d. The ratio of circles squares is \( \frac { 1 } { 2 }\)