Angled Brush

This kind of painting brush has an angled tip. Sometimes they are also known as slanted brushes.

A slanted tip can be used for curves and for creating lines and shapes that vary in coverage and thickness. It is especially the flexibility of being able to go from thin to thick marks with just one brush, making this brush shape special and useful.
Furthermore, angled painting brushes can make painting more comfortable for artists who are painting on a canvas upright on an easel.