The image depicts a cylinder that is being intersected by a plane horizontally. This type of intersection forms a cross-section, and since the plane is horizontal and parallel to the base of the cylinder, the cross-section will be a circle.

Answer:

The cross-section created by the intersection of the horizontal plane and the cylinder is a circle.

Would you like further details on this topic, or do you have any specific questions?

Here are 5 related questions for deeper understanding:

1. How is the area of the cross-sectional circle calculated if the radius of the cylinder is given?
2. What happens if the plane intersects the cylinder at an angle instead of horizontally?
3. How can the volume of the cylinder be calculated given the height and radius?
4. What is the surface area of a cylinder, and how is it derived?
5. How does the position of the plane affect the size of the cross-sectional circle?

Tip: In solid geometry, cross-sections reveal different shapes depending on how a plane cuts through a 3D figure. Understanding these cross-sections helps in solving complex geometry problems.