digraph SeaOfTypes {

    Real [label="ℝ", fontsize=24, shape=plaintext];

    Degrees [label="Degrees", fontsize=20, shape=plaintext];
    Turns [label="Turns", fontsize=20, shape=plaintext];
    Radians [label="Radians", fontsize=20, shape=plaintext];

    Degrees -> Real
    Turns -> Real
    Radians -> Real
}