Triangle – 3 SidesSquare – 4 SidesPentagon – 5 SidesHexagon – 6 sidesHeptagon – 7 SidesOctagon – 8 SidesNonagon – 9 SidesDecagon – 10 SidesMore …

What are basic shapes called?

Rectangle, square, circle and triangle are known as basic plane shapes. For example, square, rectangle, triangle, diamond and circle. They are also called flat shapes.

How do you describe shapes in math?

In geometry, a shape can be defined as a form characterised by its number of sides, the size of its angles and its dimensions.