Question

Two circles are congruent if they have __________ .

• A. Equal diameter
• B. Equal chords
• C. Same Centres
• D. Cannot be determined

Answer 1

The correct option is A Equal diameter

Two circles are congruent if they have equal radius.
We know that diameter = 2 $\times$ radius.
Equal radii means equal diameters.
Hence, two circles are also congruent if they have equal diameters.