If ΔABC is isosceles, BC = 5, and AC > 10, which of the following statements must be true?

(A)  AB > 10
(B)  BC > AB
(C)  AB = BC
(D)  AC = 11
(E)  AB = 6

Most online SAT preparation programs are merely repurposed books, giving students the burdensome, confusing, and often time consuming task of figuring out how each answer explanation relates to the execution of the problem and the process required to actually work out the answer. ePrep videos model problem solving in the very environment (i.e., same space, same pencil) that students will face on test day.

The following is a real example of an SAT practice question illustrating the difference between “showing” and “telling” the answer:


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