新手问题,python ,判断三角形的类型答:triangle1 = (5, 5, 5)triangle2 = (3, 4, 5)triangle3 = (3, 4, 5)triangle4 = (1, 2, 5)triangle5 = (2, 2.5, 3.9)def is_triangle(sides):a, b, c = sorted(sides)if (a + b) < c:return False if a <= 0 or b <= 0 or c <= 0:return False return ...