Question

9)
4.
The radius of a circle is 6 cm. The angle subtended by an arc of the circle at centre is 60°
Find the length of arc​

Answer 1

Theta = s/r (s= lenth of arc, r= radius)
S = theta x r
S = (60 x pie/180) Radian x 6. ( coverting degree into radian)
S = (pie/3) x 6
S = 2 pie
S = 2 x (22/7)
S = 44/7

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Answer 2

• Length of arc = l
• Radius = r = 6 cm
• Angle at the centre = x = 60

Now equation to be used :-
l = ( 2 * pie * r * x ) / 360
= ( 2 * 22 * 6 * 60 ) / ( 360 * 7 )
= ( 15840 ) / ( 2520 )
= 6.2857 cm or 44 / 7 cm