All circles are ?

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Similar, not congruent

Congruent, not similar

Similar, may be congruent

Congruent, may be similar

answer is C.

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Detailed Solution

Concept: In this question, we have to explain circles are congruent or similar. Here, congruence means the shape should have the same size and also the same form. On the other hand, Similar circles means having the same shape.
We all know that circles have the following properties:
Similarity is having the same shape but different sizes. Every circle is the same shape. All circles are the same.
Congruent means the same form and size. The sizes of different circles can be the same or different. Any two circles can be congruent.
Therefore, all circles are similar but may be congruent.
Hence, the correct answer is option 3.

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