The Navy Civil Engineer Corps is responsible for large-scale construction and public works projects, and engineer candidates are required to display leadership and supervisory skills. The Corps is ...
With all cutting operations involving concrete, bricks or stone, there is a real danger of injury from flying scalpings. ALWAYS wear protective goggles/glasses, and when cutting with a power saw wear a dust mask and use water suppression. Power saws are lethal in the wrong hands.
Sure, you can use a hacksaw for doing most of these tasks, but a grinder is super quick. Angle grinders make use of a disk of abrasive material spun at a high rotational speed by an electric motor in order to perform the cutting action. Angle grinders can be powered by compressed air or gas (petrol). However mains powered or cordless versions are the most most likely types to be used by the average DIYer.