Distance around an unmarked circle can blank be measured

Question

asked Jul 14, 2017 202k views

2 Answers

Igor Ostrovsky · Answer 1 · 2017-07-16T07:29:09+0000

Answer with explanation:

Circumference of circle =2 π r, where r is radius of circle.

If total length , that is thread or any wire used for constructing this circle is l, then

l=2 π r

If, length of circle =1 unit

$1 \text{unit}=(l)/(2*\pi*r)\\\\ \text{For Distance around an unmarked circle=s}=(sl)/(2*\pi*r)$

If central angle is given=Ф , then

⇒Length of segment=Radius of circle(r) × Central Angle (Ф), where Ф, is in radians.

$\text{Length of segment}=(\pi*\o*r )/(180^(\circ))$