What are the different types of glass cracks and how do they differ from each other?

There are three main types of glass cracks: radial cracks, concentric cracks, and impact cracks. Radial cracks start from a single point and extend outward like spokes on a wheel. Concentric cracks form circles around the point of impact. Impact cracks are caused by a direct force and have a distinctive point of impact. Each type of crack differs in how they spread and the force that caused them.