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  1. Printable Math Worksheets & Charts @ www.mathworksheets4kids.com Name : Points which lie on the same line are called collinear. Points which do not lie on the same line are called non-collinear. Points or lines which lie on the same plane are called coplanar. Points or lines which do not lie on the same plane are called non-coplanar. Collinear ...

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  2. 🔗. 2.3 Planar Graphs. 🔗. Objectives. After completing this section, you should be able to do the following. Distinguish between planar and non-planar graphs. Use Euler’s formula to prove that certain graphs are non-planar. Apply Euler’s formula to polyhedra. 🔗. Section Preview. 🔗. Investigate!

  3. This ensemble of printable worksheets for grade 8 and high school contains exercises to identify and draw the points, lines and planes. Exclusive worksheets on planes include collinear and coplanar concepts.

    • Properties of Planar Graphs
    • Non-planar Graph
    • Properties of non-planar Graphs
    • Graph Coloring
    • Applications of Graph Coloring
    • State and Prove Handshaking Theorem.
    If a connected planar graph G has e edges and r regions, then r ≤e.
    If a connected planar graph G has e edges, v vertices, and r regions, then v-e+r=2.
    If a connected planar graph G has e edges and v vertices, then 3v-e≥6.
    A complete graph Knis a planar if and only if n<5.

    A graph is said to be non planar if it cannot be drawn in a plane so that no edge cross. Example:The graphs shown in fig are non planar graphs. These graphs cannot be drawn in a plane so that no edges cross hence they are non-planar graphs.

    A graph is non-planar if and only if it contains a subgraph homeomorphic to K5 or K3,3 Example1: Show that K5is non-planar. Solution: The complete graph K5contains 5 vertices and 10 edges. Now, for a connected planar graph 3v-e≥6. Hence, for K5, we have 3 x 5-10=5 (which does not satisfy property 3 because it must be greater than or equal to 6). Th...

    Suppose that G= (V,E) is a graph with no multiple edges. A vertex coloring of G is an assignment of colors to the vertices of G such that adjacent vertices have different colors. A graph G is M-Colorable if there exists a coloring of G which uses M-Colors. Proper Coloring:A coloring is proper if any two adjacent vertices u and v have different colo...

    Some applications of graph coloring include: 1. Register Allocation 2. Map Coloring 3. Bipartite Graph Checking 4. Mobile Radio Frequency Assignment 5. Making a time table, etc.

    Handshaking Theorem:The sum of degrees of all the vertices in a graph G is equal to twice the number of edges in the graph. Mathematically it can be stated as: ∑v∈Vdeg(v)=2e Proof: Let G = (V, E) be a graph where V = {v1,v2, . . . . . . . . . .} be the set of vertices and E = {e1,e2. . . . . . . . . .} be the set of edges. We know that every edge l...

  4. Planar Graphs. Problem 1. There are three houses A, B, and C. Each house needs water from the facility W , gas from the facility G, and electricity from the facility. E. Can you draw lines connecting each house to each of the facilities below so that the lines do not intersect? W. G. E.

  5. Apr 11, 2022 · A planar graph is one that can be drawn in a plane without any edges crossing. For example, the complete graph K₄ is planar, as shown by the “planar embedding” below.

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  7. 1. Planar graphs A curve is a subset of the plane of the form f(x;y) jx= f(t);y= g(t);0 t 1g, where fand gare continuous functions. A graph is planar if it can be drawn in the plane so that edges are represented by curves which don’t cross (except at vertices). For example, we can see that the complete graph K 4 is planar using second drawing,

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