Question 1117754
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The central angle is 3/8 of the complete circle, so the circular arc is 3/8 of the circumference:<br>
{{{(3/8)(8)(2pi) = 6pi}}}<br>
When the cone is formed, that 6pi is the circumference of the base.<br>
Then the radius of the base is {{{6pi/(2pi) = 3}}}