check triangle

Author: qiwsir

newcodes/answers/q50.py

@@ -0,0 +1,54 @@
+#!/usr/bin/env python
+# coding=utf-8
+import math
+
+def sorted_sides(sides_lst):
+    sides = sorted(sides_lst)
+    x, y, z = sides[0], sides[1], sides[2]
+    return float(x), float(y), float(z)
+
+def is_triangle(sides_lst):
+    x, y, z = sorted_sides(sides_lst)
+    if x >=0:
+        if (x + y > z):
+            return True
+        else:
+            return False
+    else:
+        return False
+
+def side_triangle(sides_lst):
+    x, y, z = sorted_sides(sides_lst)
+    if x == y or y == z:
+        return "isosceles"
+    elif x == z:
+        return "equilateral"
+    else:
+        return "scalene"
+
+def angle_triangle(sides_lst):
+    x, y, z = sorted_sides(sides_lst)
+    difference = z**2 - (x**2 + y**2)
+    if difference == 0:
+        return "right"
+    elif difference > 0:
+        return "obtuse"
+    else:
+        return "acute"
+
+def area_triangle(sides_lst):
+    x, y, z = sorted_sides(sides_lst)
+    s = (x + y + z)/2
+    a = math.sqrt(s*(s-x)*(s-y)*(s-z))
+    return round(a, 3)
+
+if __name__ == "__main__":
+    triangle_sides = input("please input three sides of triangle, and split them by space:")
+    sides_lst = triangle_sides.split()
+    if is_triangle(sides_lst):
+        result_side = side_triangle(sides_lst)
+        result_angle = angle_triangle(sides_lst)
+        area = area_triangle(sides_lst)
+        print("The triangle is {0} and {1}. Its area is {2}".format(result_side, result_angle, area))
+    else:
+        print("Sorry, the sides cannot be the side of triangle.")