Beating the U-Boats

The British Navy faced a blockade that threatened their supply routes. To counter this, they used geometry to optimize the protection of their convoys. By arranging supply ships in a circular formation, they minimized the number of guardships needed. As the convoy size increased, the area of the circle grew faster than its circumference, allowing more efficient protection with fewer guardships. This strategic use of geometry helped the British maintain their supply lines and continue their war efforts.

What geometric principle allowed Churchill's advisors to determine the efficiency of larger convoys?

In what way did increasing the size of convoys help the British Navy during the war?