harry_wang0的博客

python第一课，课后练习

第一题 import math as m r = float( input('Enter the length from the center to a vertex:') ) s = 2 * r * m.sin( ( m.pi / 5 ) ) a = 5 * s ** 2 / ( 4 * m.tan(m.pi / 5.0 ) ) print('The area of the pentago...