Question

Find the length of AB
80° arc

Answer 1

11.2

Explanation:

The formula for an arc length is
`(a)/(360\\)`2πr {a=inside angle(in this case 80°) r=radius}

Simplify this formula by dividing the bottom by two and combining pi and r with the top.

`(\pi80times8 )/(180)`

80 times 8 is 640, so

`(640\pi )/(180\\)`

plug 640 times pi into a calculator and divide by 180.

you'll get 11.170107etc

Round your answer to the nearest tenth, and you get;

11.2

Sorry the steps are so confusing!

Answer 2

I think it is 90. I hope this helpsb