new to python and can not figure out why this code is not working. any help would be greatly appreciated. Thank you in advance

Edit Source Debug Tools Window Help sting3.1 listing 3.2 programming Exercise 3.5 programmingExercise.py 1 ( 1 # Programming exercise 3.5 2 1mport math sides - float(input("Enter the number of sides: ")) length = float(input("Enter the side length: ")) 7 area = float( sides - float(length 2)) / 42 stan (3.1415 / sides) Exceptions Call Stack Options File "/home/anthony Documents/CSC-101/ programming Exercise3 5", line 7. in module area-roatr sides Floatflength - 2/4 tan(3.1425 / sides) builtins.NameError: name 'tan' is not defined 10 11 12 13 Search Stack Data Debug 10 Python Shell Debug Vistdin.stdout stderr) appears below Enter the number of sides: 5 Options Une 7 Colo O