Amy is using a drawing program to complete a construction with which she is almost finished. which construction is she completing?

an equilateral triangle inscribed in a circle
a square inscribed in a circle
a regular pentagon inscribed in a circle
a regular hexagon inscribed in a circle

Because it says "she's almost finished" the answer is A. An equilateral triangle inscribed in a circle. She just needs to join the upper intersection of circles with point A and C. If it wasn't for that "almost finished" you could say B. A square inscribed in a circle because she could both the upper and the lower intersection of the circles with A and C and that would create a diamond shape and every diamond is firstly a square.

Final A. An equilateral triangle inscribed in a circle (due to that "almost finished")