Andre said, "I found two figures that are congruent, so they can’t be similar." Diego said, "No, they are similar! The scale factor is 1."
who is correct

Draw the line of reflection that reflects △abc onto triangle δ a'b'c'

(a) (8%) compute the probability of an even integer among the 100 integers 1! , 2! , 3! , until 100! (here n! is n factorial or n*(n-1)*(n-2) *… 1) (b) (16%) compute the probability of an even integer among the 100 integers: 1, 1+2, 1+2+3, 1+2+3+4, …., 1+2+3+… + 99, and 1+2+3+… + 100

What properties allow transformation to be used as a problem solving tool