How are these triangles similar?

What is negative 3/9 times negative 2/8 ?

Abicycle training wheel has a radius of 3 inches. the bicycle wheel has a radius of 10 inches.approximately how much smaller, in square inches and rounded to the nearest hundredth, is the area of the training wheel than the area of the regular wheel? *

D. in a discrete probability distribution, the sum of the probabilities for the discrete variables will be > 1. true or false