3. It's consisting of vertices and edges that connect these vertices. Its have different types that differ with respect to the kind and number of edges that can connect pair of vertices..

4.  Set V = v(G) whose element are called vertices, points or nodes of G..  Set E =E(G) of unordered pairs of distinct vertices called edges of G استغفر الله وأتوب إليه

5. 1..Simple of graph: G(V,E)consist of V, a nonempty set of vertices and E, a set of unordered pairs of distinct elements of V called edges.. ab c d e1 e2 e3 e4 e5

6. a c BdBd b e1 e2 e3 e4 e5

7. AcAc b d a c e1 e2 e3 e4 e8 e7 e5e6 e9

8. Fine the components of the short and represent to matrix…and what it type of it ? A b C d

9. G=(V,E) V=[a,b,c,d] E=[(a,b),(b,c),(b,d),(a,c),(c,d),(a,d)] |V|=4 vertices.. |E|=6 edges.. Deg(a)=3 Deg(b)=3 Deg(c)=3 Deg(d)=3

10. a,b,c,a length =3 d,b,c,d length =3 a,b,c,d,a length =4 Matrix: a b c d a 0 1 1 1 b 1 0 1 1 c 1 1 0 1 d 1 1 1 0 Type of graph :{simple graph}..

11.  1 2  c F b a a c b d c a f b d

12.  دانه محمد  مها راشد  سحر سعيد  هيا عبد الله  هيا سالم