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Chapter 9: Q1. (page 332)

Find the number of odd and even vertices in each network. Imagine travelling each network to see if it can be traced without backtracking.

Short Answer

Expert verified

The number of odd and even vertices is 4 and 1.

Step by step solution

01

Step 1. Given information:

The given figure is as follows:

02

Step 2. Concept use.

A vertex with odd number of edges attached to it is called odd vertex and a vertex with even number of edges attached to it is called even vertex.

03

Step 3.  Applying the concept. 

By observing the given network, four nodes are having three lines connected to it and one node with four lines connected to it.

A vertex with odd number of edges attached to it is called odd vertex and a vertex with even number of edges attached to it is called even vertex.

Hence, the number of odd vertices =4.

The number of odd vertices =1.

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