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Similar triangles (part 3)

In the diagram, triangle ABC is similar to triangle DEF. Move the slider to vary the size and position of triangle DEF.

1. What features are preserved in similar triangles?
2. When the two triangles are congruent, what do you notice about the ratios of the corresponding sides?
3. Are similar figures necessarily congruent?

© State of New South Wales, Department of Education, 2018