The image produced by this construction is an Isosceles triangle
Analysis of the construction
Constructing a diameter and its perpendicular bisector in a circle results in an image of an isosceles triangle within the circle.
When a diameter is drawn, the perpendicular bisector intersects the circle at its center.
Connecting these points forms isosceles triangle with the diameter as the base and the perpendicular bisector as the height.
The points at which the diameter and perpendicular bisector intersect the circle, forms the equal sides of parallel