radius
definitions
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noun
the distance from the center of a circle to its circumferencefr: rayon
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noun
a circular area extending from a center pointfr: zone d'influence
examples
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The radius of the circle is 5 cm.
Le rayon du cercle est de 5 cm.
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The radius of the storm is 100 miles.
Le rayon de la tempête est de 100 miles.