Question

Find the length of an arc on a circle whose radius is 10 cm and whose central angle subtends a central angle of 20º

Answer 1

Answer: 3.49cm

Reason: this is because the equation for finding the length of arc it is πxd (pie times diameter) and if you are given an angle it is the - size of the angle/360 times π times diameter -
So,
Because you are given the radius you have to do 10x2 =20cm which is the diameter.
Now, you have to do,
20/360 x π x 20
= 3.4906585…
And you generally round up to 2dp
So it would be
3.49cm