document.write( "Question 1074822: The radius of a circle is 4 meters. What is the angle measure of an arc ​𝜋 meters long?\r
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Algebra.Com's Answer #689483 by Boreal(15235)\"\" \"About 
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The circumference is 2*pi*r=8pi meters.
\n" ); document.write( "pi/8pi=1/8, so pi meters is 1/8th of the circumference or 1/8 of 360 degrees or 45 degrees.
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