Question

Using paper folding to construct a line perpendicular to a given line through a point fold the paper through the point so that the given line segment lies:
A. Perpendicular to the paper's edge
B. On the point
C. At an angle
D. Upon Itself

Answer 1

Correct answer: D. Upon Itself
A line segment has an angle that is exactly 180°. As perpendicular lines are lines meeting at the right angle, or 90°. If we then use paper folding to construct a line perpendicular to a given line, the given line should be directly above each other once folded.

Answer 2

Upon Itself ~~~~~~~~~~~~~~~~~ APEX