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Practice problem

Which Circles Are Congruent?

By Liza Sulkin

Circle A has center at the origin and radius x. It is rotated 90∘90^{\circ} clockwise.

Circle B has center at the origin and radius y. It is rotated 90∘90^{\circ} counterclockwise.

Circle C has center at the origin and radius y. It is rotated 90∘90^{\circ} clockwise.

Which (if any) of these circles are congruent?

Choose one answer

Type a concept, like “slope” or “photosynthesis”.

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