Question

If the circumference of the circle is 54 cm what is the length of xy?Please help me !

Answer 1

So tell me this. Do you know that 2 pi radians is 360 degrees?

Answer 2

Yes.

Answer 3

and you know that circumference of circle = 2 Pi r where 2 pi = 360, ok?

hence 120 = 2 pi/ 3 ?

Answer 4

so 120 x ( 6.28)

Answer 5

lol no.

this is Pi radians. not Pi = 22/7.

Basically i meant that if 2 pi = 360 degrees meant the whole circumference,

2pi / 3 = 120 degrees would mean the length of arc XY i.e. 1/3rd of the whole circumference.

So actually XY is 1/3rd of the circumference which is 1/3 x 54 = 18 cm.