document.write( "Question 1104986: What is the measure of the central angle of a circle with radius 30 centimeters that intercepts an 18pi centimeters arc
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Algebra.Com's Answer #719730 by ikleyn(52790)\"\" \"About 
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document.write( "\"R%2Aalpha\" = length of the arc = \"18%2Api\",   or\r\n" );
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document.write( "\"30%2Aalpha\" = \"18%2Api\"  ====>  \"alpha\" = \"%2818%2Api%29%2F30\" = \"3pi%2F5\" = 108 degrees.\r\n" );
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