How many three letter permutations are possible from the letters in the word ACTION? ("ACT" is not the same as "CAT" so order is
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a) Corresponding angles of similar figures are congruent, so
b) Scale factor = (image)/(preimage). Since we are looking for ABCD to WZYX, this means that WZYX is the image and ABCD is the preimage. Thus, the scale factor is
c) Since the scale factor is 5/2,