The first step of a construction states: "Construct two perpendicular

bisectors". Which construction is being described?

A. A circle inscribed in a triangle

B. A circle circumscribed about a triangle

C. Copying a segment

D. Copying an angle

B. A circle circumscribed about a triangle

Step-by-step explanation:

The circumcenter of a triangle is where the perpendicular bisectors of the sides meet. The center of a circle is always on the line that is the perpendicular bisector of any chord. The sides of a triangle are chords of the circumcircle.

The given step would allow you to identify the center of the circumcircle, hence construct that circle.