Kate is constructing an equilateral triangle. she has already used her straightedge to construct the line segment shown. a line segment with endpoints labeled as a and b. what should kate do for her next step? use the straightedge to draw a line that passes through point a. place the point of the compass on point a and draw an arc, using ab as the width for the opening of the compass. use the straightedge to draw another line segment that does not intersect ab¯¯¯¯¯. place the point of the compass on point a and draw an arc, using a width for the opening of the compass that is less than 12ab.