Posted by Emily on Tuesday, March 20, 2007 at 8:46am.
Whats the difference between an arc [of a circle]'s length and measure? And how do you find each of them?
The "measure" of an arc is the angle that it subtends from the center of the circle. Call that angle A.
The length of the arc is
2 pi R * [A/(2 pi)] = R*A, if A is in radians and R is the radius of the circle, or pi R*A/180, if A is measured in degrees.
Emily think of a pizza that has been cut into 8 equal pieces, and look at one of those pieces.
The arc measure would be the angle that your piece of pizza has as its point, in this case 45ยบ
The arc length would be the length of the curved part of your pizza slice, in this case 1/8 the circumference of the pizza
(remember C=2*pi*r)

math  jevari, Monday, November 26, 2012 at 9:47pm
6.3
Answer This Question
Related Questions
 math  An angle of 1.8 radians at the center of the circle subtends an arc of ...
 maths  an arc of a circle subtends a central angle of 5pi/6 radians.if the ...
 apex geometry  Hannah constructed two similar circles as seen in the image ...
 Math  I think this will be the last one. Find the radius of circle C if the ...
 algebra  The area of a circle is 78.5 square centimeters, and a subtending arc ...
 Geometry  The question is to find the measure of arc PQ in Circle A. The point ...
 geometry  Point C is the center of the circle. The measure of angle ACB is 15x...
 trigonometry  Find the length of the arc that subtends an angle of measure 70 ...
 math advanced functions  a) Determine the measure of the central angle that is ...
 science  A thin nonconducting rod is bent to form the arc of a circle of ...
More Related Questions