#1**0 **

Arc Length = (x * π/180) × r

9.7 =(x * pi/180) * 9, solve for x

Solve for x:

9.7 = (π x)/20

Rewrite the left hand side of the equation.

9.7 = 97/10:

97/10 = (π x)/20

Reverse the equality in 97/10 = (π x)/20 in order to isolate x to the left hand side.

97/10 = (π x)/20 is equivalent to (π x)/20 = 97/10:

(π x)/20 = 97/10

Solve for x.

Divide both sides by π/20:

**x = 194/π =61.75 =~62 degrees**.

Guest Jun 21, 2018