Congruence and Similarity

Hong Kong

Stage 1 - Stage 3

Which pair of triangles are similar?

Select the two triangles that are similar.

A

B

C

D

Easy

Less than a minute

The smaller quadrilateral has been reflected, then enlarged and finally rotated.

Dave wants to transform a shape but wishes it to remain similar to the original shape. Which of these transformations is he able to perform, while maintaining similarity?

Write the following using mathematical symbols:

$\triangle ABC$△`A``B``C` is similar to $\triangle DEF$△`D``E``F`.

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