### Instruction: the radius of a semi circle is 6.4 cm then its perimeter is ? Let's write a Python program to solve it.### Response: import math
n0 = 6.4
t0 = 2 * math.pi * n0
t1 = n0 * 2.0
t2 = t0 / 2.0
answer = t2 + t1
print(answer)