src/Maths/Geometry/Rectangle.php
public function getHeight()
    {
        return min(array(
            ($this->getPointB()->getAbscissa() - $this->getPointA()->getAbscissa()),
            ($this->getPointD()->getOrdinate() - $this->getPointA()->getOrdinate())
        ));
    }
public function getHeight()
    {
        return min(array(
            ($this->getPointB()->getAbscissa() - $this->getPointA()->getAbscissa()),
            ($this->getPointD()->getOrdinate() - $this->getPointA()->getOrdinate())
        ));
    }
Get rectangle's height (by convention width > height)

@return  numeric