n. plural of radius 1 a straight line from the center to the perimeter of a circle; 2 the outer and slightly shorter of the two bones of the human forearm
She used a double radii in her math problem.
She used a double radii in her math problem.
Hear it
half the diameter; r; line from center to perimeter of a circle
perimeter
3 syllables
ra-di-i
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