If the length of the longest chord of a certain circle is 24, what is the radius of that certain circle?
Choices
A) 12	B) 5	C) 10	D) 15	E) 20
Longest chord of a circle is the diameter of the circle   diameter = 2 * radius   If diameter of the circle is given as 24 = 2 * 12   so radius of the circle = 12   correct answer - 12
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If the length of the longest chord of a certain circle is 24, what is the radius of that certain circle?