Line a passes through the points (0,2) and (2,−2). line b passes through the points (0,4) and (1,2). line c passes through the points (0,−1) and (4,1). identify which lines are parallel and which lines are perpendicular.

The perimeter of an equilateral triangle is 4 cm more than the perimeter of a square and the length of a side of the triangle is 8 cm more than the length of a side of the aware. find the length of a side of the equilateral triangle