We need to construct an equilateral triangle inscribed in a circle, two congruent circles are created such that the center of each circle is also a point on the other circle.
Following would be correct directions:
A. Using a straightedge draw a line segment between the endpoint of the diameter of the circle that is not also the radius of the second circle and the bottom point of intersection of the two circles.
B. Using a straightedge draw a line segment between the endpoint of the diameter of the circle that is not also the radius of the second circle and the upper point of intersection of the two circles.
D. Using a straightedge draw a line segment between the top intersection point of the two circles and the radius of the first circle.
Therefore, incorrect direction would be
C. Using a straightedge draw a line segment between the two intersection points of the two circles.
