Question

What is the length of the arc subtended by the central angle of 240∘, when such arc is located on the Unit Circle?

Answer 1

The length of the arc is

4.19

(

2

d

p

)

unit .

Explanation:

The circumference of unit circle

(

r

=

1

)

is

2

⋅

π

⋅

r

=

2

⋅

π

⋅

1

=

2

⋅

π

unit

The length of the arc subtened by central angle of

240

0

is

l

a

=

2

⋅

π

⋅

240

360

≈

4.19

(

2

d

p

)

unit .