Cross section means the representation that the intersection of an object by a airplane along that is axis. A cross-section is a form that is surrendered from a heavy (eg. Cone, cylinder, sphere) when reduced by a plane.

You are watching: Vertical cross section of a cone

For example, a cylinder-shaped object is cut by a airplane parallel to its base; climate the result cross-section will certainly be a circle. So, there has actually been one intersection that the object. It is not essential that the object needs to be three-dimensional shape; instead, this concept is also applied for two-dimensional shapes.

Also, friend will check out some real-life examples of cross-sections such together a tree ~ it has actually been cut, which shows a ring shape. If we reduced a cubical crate by a plane parallel to its base, then we attain a square.

Table that contents:Types of cross section

Cross-section Definition

In Geometry, the cross-section is characterized as the shape derived by the intersection of hard by a plane. The cross-section that three-dimensional form is a two-dimensional geometric shape. In other words, the shape obtained by cut a solid parallel come the base is recognized as a cross-section.

Cross-section Examples

The instances for cross-section because that some shapes are:

Any cross-section the the ball is a circleThe vertical cross-section of a cone is a triangle, and also the horizontal cross-section is a circleThe vertical cross-section of a cylinder is a rectangle, and also the horizontal cross-section is a circle

Types of overcome Section

The cross-section is of 2 types, namely

Horizontal cross-sectionVertical cross-section

Horizontal or Parallel overcome Section

In parallel cross-section, a airplane cuts the solid shape in the horizontal direction (i.e., parallel come the base) such that it create the parallel cross-section

Vertical or Perpendicular cross Section

In perpendicular cross-section, a airplane cuts the solid shape in the upright direction (i.e., perpendicular to the base) such the it creates a perpendicular cross-section

Cross-sections in Geometry

The overcome sectional area of various solids is given here with examples. Allow us figure out the cross-sections of cube, sphere, cone and cylinder here.

Cross-Sectional Area

When a aircraft cuts a hard object, an area is projected onto the plane. That airplane is then perpendicular to the axis of symmetry. Its projection is well-known as the cross-sectional area.

Example: find the cross-sectional area the a aircraft perpendicular to the basic of a cube the volume equal to 27 cm3.

Solution: due to the fact that we know, 

Volume that cube = Side3


Side3 = 27

Side = 3 cm

Since, the cross-section that the cube will be a square therefore, the next of the square is 3cm.

Hence, cross-sectional area = a2 = 32 9

Volume by cross Section

Since the cross section of a heavy is a two-dimensional shape, therefore, us cannot recognize its volume. 

Cross part of Cone

A cone is considered a pyramid with a circular cross-section. Depending upon the relationship between the aircraft and the slant surface, the cross-section or likewise called conic sections (for a cone) could be a circle, a parabola, one ellipse or a hyperbola.


From the above figure, we deserve to see the different cross sections of cone, as soon as a plane cuts the cone at a different angle.

Also, see: Conic Sections course 11

Cross sections of cylinder

Depending on how it has actually been cut, the cross-section the a cylinder might be one of two people circle, rectangle, or oval. If the cylinder has a horizontal cross-section, then the shape derived is a circle. If the plane cuts the cylinder perpendicular to the base, then the shape derived is a rectangle. The oval shape is obtained when the aircraft cuts the cylinder parallel come the base through slight sport in that is angle


Cross sections of Sphere

We recognize that of all the shapes, a sphere has the smallest surface area because that its volume. The intersection of a aircraft figure with a sphere is a circle. Every cross-sections the a sphere room circles.


In the over figure, we deserve to see, if a aircraft cuts the round at various angles, the cross-sections we obtain are one only.

Articles on Solids

Solved Problem


Determine the cross-section area the the provided cylinder whose elevation is 25 cm and radius is 4 cm.

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Radius = 4 cm

Height = 25 cm

We understand that once the airplane cuts the cylinder parallel to the base, climate the cross-section obtained is a circle.