Me right now or i'll lose !

1. which of the following sets of angle measures can be used to draw an acute isosceles triangle? select all that apply.

80°, 80°, 40°
60°, 60°, 60°
20°, 140°, 20°
50°, 50°, 80°
75°, 30°, 75°
80°, 55°, 45°

2. two sides of a triangle are 5 centimeters and 6 centimeters. what is the range of possible lengths for the third side? explain your reasoning using complete sentences.