Part (a): The sum of the interior angles of a triangle is 180°. The given measurements are: 20°, 60° and 100° Sum of the given measurements = 20 + 60 + 100 = 180° Therefore, these measurements can form a triangle
Part (b): The sum of the interior angles of a triangle is 180°. The given measurements are: 85° , 89° and 6° Sum of given measurements = 85 + 89 + 6 = 180° Therefore, these measurements can form a triangle