Question

3
select the correct answer from the drop-down menu.
compare the steps for constructing a perpendicular line to line ab through point c using a reflective device and using paper.
when using paper to construct the perpendicular line, the paper is folded so that and the two sides of line ab will lie exactly on top of each other.
when using a reflective device to construct a line perpendicular to line ab, set one , and then swing the other end of the device so the reflection of line ab coincides with
undo
point a coincides with point b
point c lies on the fold
both points a and b lie on the fold

Explanation:

For paper folding to make a perpendicular to AB through C: folding so line AB lies on itself requires the fold to be a line of symmetry for AB, which means point C must be on the fold to ensure the perpendicular passes through C. For the reflective device method: to make the reflection of AB coincide with itself, we first set the device so point A coincides with point B, then adjust to align the reflection.

Answer:

First dropdown (paper folding): point C lies on the fold
Second dropdown (reflective device): point A coincides with point B