I am working on a Eratosthenes Method lab and was hoping i could ask for some help. I had to measure 3 shadow sticks and then compare my results

Location 1

Distance between sticks = __7_ cm

Shadow length of second stick = __6_ cm , Ratio = ___3________

arctan (ratio) = Calculated angle of insolation = __52____ degrees.

Circumference. 48.5

Location 2

Distance between sticks = ___1.5_____ cm

Shadow length of second stick = ___2_______ cm , Ratio = __.46_________

arctan (ratio) = Calculated angle of insolation = __24.7____ degrees.

Circumference = (360 x distance between sticks) = 30 cm

angle

Location 3

Distance between sticks = __6_ cm

Shadow length of second stick = __5_ cm , Ratio = ___3________

arctan (ratio) = Calculated angle of insolation = ___?__ degrees.

Circumference. ? (360 x distance between sticks) = ?

angle

Need help with this question-----Finally, calculate the percentage of error between the direct measurement, which should be treated as the accepted value, and the average the three trials as the experimental value.

Location 1

Location 2

Location 3