A Blank 1 Question 7 is generated when the plane is perpendicular to the axis of the cone.

In geometry, when discussing cones and planes, a plane perpendicular to the axis of the cone produces a specific type of conic section. When a plane intersects a cone in such a manner, the resulting shape is a circle. This is due to the plane cutting through the cone horizontally, maintaining equal distances from the apex of the cone to the edge of the intersection at all points.

To summarize, when the plane is perpendicular to the axis of the cone, the shape formed is a circle. This understanding comes from the geometric properties of conic sections and their relationships with planes and conical shapes.