Draw a circle with any radius. Measure the radius of the circle and arc lengths of angles shown in the data table 3. Compare measured ?rad to calculated ?rad and calculate the percent difference.

Table 3: 0 Degrees Measured Calculated % error Brad =5/r Ored = Open X n /180 450 7 600 7. 7 9.3 900 1350 72 19.5 2709 7.7 38. 2 3300 7.7 47.3