Long-Term Memory Review 3. A student wants to prove that the base angles of an isosceles triangle are congruent. The student draws isosceles triangle ABC with base angles B and C, as shown below. B M Point M is drawn as the midpoint of BC. Which of the following could be used as part of the proof that LB = LC? Select All that apply. O AM = AM because of the Symmetric Property. BM = CM because of the definition of a midpoint. 0 AB ~ AC because of the definition of an isosceles triangle. AABM = 4ACM because of the SAS triangle congruence criterion. O LB = LC because corresponding parts of congruent triangles are congruent