Question

What is the first step in the construction of a line perpendicular to ab and passing through an external point M? Assume that the construction uses only a compass and a straightedge.

A.Place the compass needle on M and, keeping the compass width the same, draw two arcs that intersect AB

B. Place the compass needle at any point on AB and set the compass width to M.
C.Draw a line from point M passing through AB and mark the point of intersection.

D.Place the compass needle at any two points on AB and draw two arcs through M.