"Rear lot line" means the lot line which is opposite and furthest removed from the front lot line. In such a lot where the side lot lines meet to the rear of the lot, or where the rear lot line is less than ten feet, the minimum rear yard shall be computed from the point of intersection of the side lot lines on an imaginary line that is at equal angles from each side lot line. In the case of a corner lot, the rear lot line is opposite and furthest removed from the front lot line of least dimension.