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Answer:
B. AB/DE = AC/DF
Step-by-step explanation:
When triangles are similar, corresponding sides have the same ratio. We are told that ∆ABC ~ ∆DEF. This means that corresponding sides are ...
AB : DE
BC : EF
AC : DF
Any pair of these ratios can be used to write the proportion. Each proportion can be written in 4 different ways. The answer choices show that AB and DE are involved in the proportion we want, so we can have any of ...
AB/DE = BC/EF
AB/DE = AC/DF . . . . . . matches choice B
AB/AC = DE/DF
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<em>Additional comment</em>
When we say a proportion can be written 4 ways, we mean all of these versions of a proportion are fully equivalent:
- a/b = c/d
- a/c = b/d . . . . sideways
- b/a = d/c . . . . upside down
- c/a = d/b
