10. As shown in the figure, two same-sized squares partially overlap, where the area of the red part $\mathrm{A}$ is equal to the area of the yellow part $\mathrm{B}$, and the area of the yellow part $\mathrm{B}$ is 12 square centimeters larger than the area of the blue part $\mathrm{C}$. The area of one square is $\qquad$ square centimeters.
$72$