Question

Find the length of an arc of circle which subtends an angle of 18° at the centre,if the radius of the circle is 6 cm

Answer 1

Answer:

1.88571cm

Step-by-step explanation: Ф= 18°

R= 6 cm

length of arc = 18/360×(2πr)

                       = 1/20×(2×3.14×6)

                        =1.88571cm

Answer 2

Answer:

108 cm

Step-by-step explanation:

Given :

Angle Ф = 18

Radius r = 6 cm

We have to find length of an arc of circle :

We know :

Angle = Length of an arc / Radius

= > Ф = l / r

= > l = r Ф

Putting values here we get :

= > l = 6 × 18 cm

= > l  = 108 cm

Therefore , the length of an arc of circle is 108 cm.