What shape make things float?

The shape that helps things float is often a hull or a design that displaces a large volume of water relative to its weight. This is based on the principle of buoyancy, where an object will float if it displaces an amount of water equal to its own weight. For example, boats and ships have a wide, flat hull that allows them to displace enough water to stay afloat. Additionally, shapes with rounded or streamlined forms can also reduce resistance and enhance buoyancy.