In geometry, a square is a regular quadrilateral, which means that it has four equal sides and four equal angles (90-degree angles, or right angles).[1] It can also be defined as a rectangle in which two adjacent sides have equal length. A square with vertices ABCD would be denoted â» {\displaystyle \square } ABCD.
Ever since they were invented, catapults have been a deadly war weapon. The catapult was invented by Dionysius of Syracuse around 400 B.C. In Greek, the word catapult means to throw into. When he designed the catapult, Dionysius wanted to create an effective war weapon. The first catapult designed worked like a crossbow. To be able to make the catapult more powerful, it was made larger and stronger and set on a tripod.
The different types of Catapults used in the Middle Ages included: 1  The Ballista - The Ballista was similar to a Giant Crossbow and worked by using tension. 2  The Trebuchet - The massive Trebuchet consisted of a lever and a sling and was capable of hurling stones weighing 200 pounds with a range of up to about 300 yards.