New to python need help with this, i am using python 3 so appreciate you do it in python 3 and send me a screenshot

i ask the same question yesterday someone aswer it but when i put it in i get error

import math

r = input("Enter length from center : ")

s = 2*r*math.sin(math.radians(36))

area = 3*math.sqrt(3)*s*s/2.0

print ("Pentagon area :"+ str(area))

Section 3.2 3.1 (Geometry: area of a pentagon) Write a program that prompts the user to enter the length from the center of a pentagon to a vertex and computes the area of the pen- tagon, as shown in the following figure. 6 Chapter 3 Mathematical Functions, Strings, and Objects 3V3 The formula for computing the area of a pentagon is Area =-s2, where s is the length of a side. The side can be computed using the formula s = 2r sin where r is the length from the center of a pentagon to a vertex. Here is a sample run