Which triangle defined by the given points on the coordinate plane is similar to the triangle illustrated?

Cody ran nine miles on his first day of training. the next day he ran 1/8 that distance. how far did he run the second day?

If the circumference of the circle is below 72, what is the length of ab (the minor arc)

Two jars each have one red marble and one blue marble in them. you choose one marble randomly from each jar. which model does not represent the sample space for this experiment?