what if the length was given but the diameter was not?

⚑ Flag

1.  You would use the same equation:Arc Length = Circumference*(arc measure/360)2.  Re-write it in terms of diameter:Arc Length = pi*diameter*(arc measure/360)3.  Substitute in for Arc Length and arc measure4.  Solve for diameter by a.  Simplifying the fractionb.  Multiplying both sides of the equation by the reciprocal of that fraction (to clear it)c.  Divide by pi