Which theorem or postulate proves that triangle ABC and triangle DEF are similar? Provide your response with proper formatting.
Given:
Triangle ABC with vertices A, B, and C, where BC is the base, and vertex A is at the top. Side AB is labeled 21 units, and side BC is labeled 33 units.
Triangle DEF with vertices D, E, and F, where EF is the base, and vertex D is at the top. Side DE is labeled 7 units, and side EF is labeled 11 units.
Angle B and angle E are marked congruent with single arcs. a) AA Similarity Postulate
b) SSS Similarity Theorem
c) SAS Similarity Theorem
d) ASA Similarity Theorem
