The length of the arc of a sector of angle theta equals theta over 360 multiplied by:
APi r cubed
BFour pi r
CTwo pi r
DPi r squared
Answer & Solution
Correct answer: C. Two pi r
1. The arc is a fraction of the whole circumference.
2. That fraction is theta over 360.
3. So multiply by two pi r.
_Source: syllabus Mathematics Class X, Chapter 12, Areas Related to Circles._
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