Anyone Know How to Calculate the Area/Perimeter/Height of a Triangle?

Question

I'm a newbie to Python and I came across this question somewhere:

"Produce a programme that can calculate the perimeter of the triangle, the area of the triangle and the height of the triangle from the length of the three sides of a triangle. If the three lengths of the sides of the triangle do not define a valid triangle, a message should be displayed stating that this is not a valid calculation and the process should be terminated."

Anyone know how this could be solved? It's probably easy, but I'm a newbie so yeah

This is what I've got so far:

a = float(input('Please Enter the First side of a Triangle: '))

b = float(input('Please Enter the Second side of a Triangle: '))

c = float(input('Please Enter the Third side of a Triangle: '))

if  a + b >= c and b + c >= a and c + a >= b:

# calculate area and height here


Perimeter = a + b + c

s = (a + b + c) / 2

Area = (s*(s-a)*(s-b)*(s-c)) ** 0.5

print("\n The Perimeter of Triangle = %.2f" %Perimeter);

print(" The Area of a Traiangle is %0.2f" %Area)     
else:
print('Not a valid triangle')

I still have to calculate the height. Everything else seems to be working now :D

Answer 1

In mathematics, the triangle inequality states that for any triangle, the sum of the lengths of any two sides must be greater than or equal to the length of the remaining side.

a, b, c = 1, 1, 1 # sides of a triangle
if a + b >= c and b + c >= a and c + a >= b:
    # calculate area and height here
else:
    print('Not a valid triangle')