Choose the letter of the word or phrase that best completes each statement: The ratio of the lengths of two corresponding sides of two similar polygons is the __________ . Choose from: a. scale factor, b. AA Similarity Postulate, c. SSS Similarity Theorem, d. SAS Similarity Theorem, e. Symmetric Property of Similarity, f. midsegment, g. dilation, h. enlargement, i. reduction, j. Transitive Property of Similarity.