Answer
code
Work Step by Step
# 4.19 (Compute the perimeter of a triangle) Write a program that reads three edges for a
# triangle and computes the perimeter if the input is valid. Otherwise, display that
# the input is invalid. The input is valid if the sum of every pair of two edges is
# greater than the remaining edge.
e1, e2, e3 = eval(input("Enter three edges: "))
if e1 + e2 > e3 and e1 + e3 > e2 and e2 + e3 > e1:
res = e1 + e2 + e3
print("The perimeter is", str(res))
else:
print("The input is invalid")
