Imagine you are visiting your parents and want to get a tie out for your dog since they have no fence. The tie out will allow your dog to access a circle of space. The tie out represents the radius of the circle. Set up an equation to show the radius of the circle (length of tie out) being equal to the area of both previous pens. Use the Appendix C: Geometric Formulas Links to an external site. if needed. Solve for the radius of the circle. First use the division property of equality with pi. Then, take the square root. What is the minimum length of the radius of the circle