Equation of a line is given by y = mx + c; where m is the slope and c is the y-intercept. Parallel lines has equal slopes. Line y = -1/2x + 2 has a slope of -1/2
It's an obtuse. A triangle is considered acute if all 3 angles are acute; it is considered obtuse if one of its angles is obtuse. Ours has a 100 degree angle, so it is obtuse.
