Properties of Triangles - easy

Solution:
30 + 40 < 80 so 30, 40, 80 can not be sides of a triangle.

Solution:
70 + 60 > 100, 70 + 100 > 60 and 100 + 60 > 70 so 60, 70, 100 can be sides of a triangle.
The answer is yes.

Solution:
30 + 40 + 100 = 170 ≠ 180 => 30, 40, 100 cannot be angles of a triangle.

Solution:
20 + 60 + 95 = 175 ≠ 180 => 20, 60, 95 cannot be angles of a triangle.

Solution:
50 + 53 + 77 = 180 = 180 => 50, 53, 77 can be angles of a triangle.