Table of Contents

## What is a ring graph?

A graph G is a ring graph if each block of G which is not a bridge or a vertex can be constructed inductively by starting from a single cycle and then in each step adding an H-path that meets graph H in the previous step in two adjacent vertices. Ring graphs were first introduced by Gitler et al.

## What’s a circle graph called?

A pie chart, sometimes called a circle chart, is a way of summarizing a set of nominal data or displaying the different values of a given variable (e.g. percentage distribution). This type of chart is a circle divided into a series of segments.

**How do you use a circle graph?**

In a pie chart or circle graph, the size of each sector will be proportional to the actual value of the data it represents as seen in the images. Percentages of the total of the sample are usually represented in the sectors. One of the more common uses for circle graphs or pie charts is poll results and surveys.

**What is the join of two graphs?**

The join of two graphs G and H is a graph formed from disjoint copies of G and H by connecting each vertex of G to each vertex of H.

### Why would you use a circle graph?

A circle graph, or a pie chart, is used to visualize information and data. A circle graph is usually used to easily show the results of an investigation in a proportional manner. The arcs of a circle graph are proportional to how many percent of population gave a certain answer.

### What is ring in linear algebra?

Definition. A ring is a set R equipped with two binary operations + (addition) and ⋅ (multiplication) satisfying the following three sets of axioms, called the ring axioms. R is an abelian group under addition, meaning that: (a + b) + c = a + (b + c) for all a, b, c in R (that is, + is associative).

**What is the central vertex?**

A vertex is central in G if its greatest distance from any other vertex is as small as possible.

**How do you write an equation for a circle graph?**

Explanation: The equation of a circle is \displaystyle (x – h)^2 + (y – k)^2 = r^2, in which (h, k) is the center of the circle and r is its radius. Because the graph of the circle is centered at (0, 0), h and k are both 0. Because the radius is 3, the right side of the equation is equal to 9.