Question

The diameter of a circle is 18 inches. What is the length of a 90° arc?

Answer 1

AHH! Geometry!

14.1375

Explanation:

So to get the answer, we are going to have to make a "factor"

We first do this:(Circles have an angle of 360)

`(90)/(360) =(1)/(4)`

This tells how long the arc is in comparison to the circumference!

So let's solve the circumference!

`P=D\pi \\P=18\pi \\P=About 56.55`

Now, Multiply!

`56.55*(1)/(4) = 14.1375`

There we go!

Hope this helps!

See Ya!