ii. Give an example of Tree. (sketch the Tree)

i.

The above graph is complete because,

i. It has no loups

ii. It has no multiple edges.

iii. Each vertex is edges with each of the remaining vertices by a single edge.

Since there are 5 vertices, $ V_1, V_2 V_3 V_4 V_5 \therefore m= 5$

Number of edges = $ \frac {m(m-1)}{2} = \frac {5(5-1)}{2} = 10 $

ii. Tree: A connected graph which does not have a circuit or cycle is called a tree.

In a graph theory a tree is uncorrected graph in which any two vertices one connected by exactly one path

Example: Binding Tree

A tree in which one and only one vertex has degree are of degree one of three is called binary tree.

if in a binary tree every internal node has exactly two branches, it is called a full binary Tree,