Math question please help

Choose all answers that apply: a) ab and a’b’ are one the same line. b) quadrilaterals abcd and a’ b’ c’ d’ have the same perimeters. c) points a and a’ have the same coordinates. d) none of the above

Which point on the x-axis lies on the line that passes through point c and is parallel to lino ab?

How to choose the sign of the radical in the denominator of the formula for the distance from a point to a line.