Question

If the circumference of the circle below is 72, what is the length of AB (the mirror arc)?

Answer 1

Remember that the formula for the lenght of an arc is:

`L=2\pi r((\theta)/(360))`

Notice that the expression

`2\pi r`

is the circunference of the circle

Using this formula and the data given,

`L=72\cdot((60)/(360))\rightarrow L=12`

Therefore, the lenght of the arc is 12