Ace Carpentry requires to cut the arch for top of the entrance way. Arch requires to be 8 ft wide and 2 ft high. To draw arch, carpenters will utilized the stretched string with chald attached at end as the compass. Assume that rectangular Coordinate system is taken by choosing base of arch as x-axis and bisector line of base (or line of symmetry) as y-axis. Determine coordinates of center of circle. What radius must carpenters use to draw arch? Illustrate the work, formulas, rules, and computations for the problem.