(9) show that in a simple graph with at least two vertices there must be two vertices that have the same degree. (hint: for a proof by contradiction, consider the set of all possible degrees of a simple graph where no two vertices have the same degree. is there a problem with this set of numbers? ]

Answercounterclockwise rotation about the origin by 180 degrees followed by reflection about the y-axisexplanationthe given figure has verticesrecall that for counterclockwise rotation about the origin, when we rotate figure pqrs counterclockwise through an angle of 180° about the origin, the coordinates will becomenext, we reflect in the y-axis by negating the x-coordinates of the resulting figure to obtain,therefore the correct answer is c

6/ 11 = 0.545454 so your answer is55%

Its a right angled triangle not a right triangle