Python programming

In a right triangle, the square of the length of the longest side is equal to the sum of the squares of the lengths of the other two sides.

In an isosceles triangle the length of any two of the sides must be equal.

In an equilateral triangle the length of all three sides must be equal.

Write a program that prompts the user to enter the lengths of three sides of a triangle. The program will output a message indicating:

whether or not the lengths form a triangle and, if so$,$

whether or not the triangle is

$$a right triangle,

an isosceles triangle, and$/$or$$

an equilateral triangle.

Input Validation: Do not accept a number $<=0$ for any side.