Question

Which of the following proportions verifies that ABC and XYZ are similar?

Answer 1

They need to satisfy:

`\begin{gathered} AB\propto XY \\ AC\propto XZ \\ BC\propto YZ \end{gathered}`

Therefore:

`(AB)/(XY)=(AC)/(XZ)\Leftrightarrow(AB)/(AC)=(XY)/(XZ)`

Answer:

A