Congruent circles
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Are congruent circles.
A detripage
It is the radius. More than one are radii. All the way across is the diameter.
One shape cannot be congruent: you need two (or more) shapes which can be congruent to each other.
a radius is a straight line that goes from the centre of a circle to the edge.radii are two (or more) such lines.two radii are then two radius' lol