There are some kinds of diagrams that you probably need to know when you are making a diagram with circles. We have various kind of circle diagrams including Venn diagram, concentric circle diagram, unit circle diagram, and more. Let start with A Venn diagram that is used to show all possible logical relations between a finite collection of different sets.

These diagrams depict elements as points in the plane and sets as regions inside closed curves. This** circle Diagram** consists of multiple overlapping closed curves, usually circles, each representing a set. Check out the template/example of the diagram below.

The second type of *Circle Diagram* is called concentric circle diagram. This is a creative diagram template for Microsoft PowerPoint presentations that you can use to make onion diagrams for your presentation slides. Onion diagrams are able to show layers of a complete system in a few circles. Each circle in an Onion diagram is able to represent a component that is dependent upon the component on the inside of it. The following diagram is the unit circle diagram and parts of a circle diagram.

The unit circle is a circle with a radius of 1. The center is put on a graph where the x-axis and y-axis cross. The diagram would show positive angles labeled in radians and degrees. Terminal sides of angles form lines which are straight. Some examples of these angle measurements are 30 and 210-degrees, 60 and 240-degrees, and so on.

The diagrams that we provided above are circle diagrams. All of the diagrams are free and printable. Find more interesting and educative diagrams in our site by browsing up our category!