Question

What is the length of a 45 arc

Answer 1

a = 1.57 in

Explanation:

We know that the length of the arc in a circle is proportional to its corresponding angle which means:

a corresponds to 45

2πr corresponds to 360

then

`(a)/(45) = (2\pi r)/(360)`

then

a = (45÷360)×4×π

=1.570796326795

Answer 2

1.5707

Explanation:

i solved it using the furmola :

`2\pi * r (45)/(360)`