the distance between two parallel lines is unity. a point p lies at a distance 'a' from one of them. find the length of a side of an equilateral triangle pqr where q lies on one of the parallel lines and r lies on other line
the distance between two parallel lines is unity. a point p lies at a distance 'a' from one of them. find the length of a side of an equilateral triangle pqr where q lies on one of the parallel lines and r lies on other line












