![geometry shapes geometry shapes](https://truenorthhomeschoolacademy.com/wp-content/uploads/2020/06/TNHA-Product-Image-6th-Grade-Math.jpg)
![geometry shapes geometry shapes](http://arteascuola.com/wp-content/uploads/2018/10/paper-pattern-solids_5.jpg)
Closed shapes made of four straight lines are called quadrilateral shapes. Shapes are closed shapes that are created by joining lines together. They may form a straight line or a curved line. In other words, many points are put together to form a line. Lines are defined as a collection of points. We know that shapes are made of straight lines or curved lines and they can be open or closed.