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

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For example, a cylinder-shaped thing is cut by a aircraft parallel to its base; climate the result cross-section will be a circle. So, there has been an intersection of the object. The is not essential that the object has to be three-dimensional shape; instead, this principle is likewise applied for two-dimensional shapes.

Also, friend will view some real-life instances of cross-sections such as a tree after ~ it has been cut, which shows a ring shape. If we reduced a cubical crate by a airplane parallel to its base, climate we acquire a square.

Table that contents:Types of cross section

Cross-section Definition

In Geometry, the cross-section is identified as the shape acquired by the intersection of hard by a plane. The cross-section that three-dimensional shape is a two-dimensional geometric shape. In various other words, the shape acquired by cut a hard parallel to the base is well-known as a cross-section.

Cross-section Examples

The examples for cross-section for some forms are:

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

Types of overcome Section

The cross-section is of two types, namely

Horizontal cross-sectionVertical cross-section

Horizontal or Parallel cross Section

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

Vertical or Perpendicular overcome Section

In perpendicular cross-section, a airplane cuts the solid form in the upright direction (i.e., perpendicular come the base) such the it create a perpendicular cross-section

Cross-sections in Geometry

The cross sectional area of different solids is offered here through examples. Let us number out the cross-sections of cube, sphere, cone and also cylinder here.

Cross-Sectional Area

When a airplane cuts a hard object, an area is projected ~ above the plane. That plane is climate perpendicular to the axis of symmetry. Its estimate is known as the cross-sectional area.

Example: find the cross-sectional area that a plane perpendicular to the basic of a cube the volume same to 27 cm3.

Solution: since we know, 

Volume that cube = Side3


Side3 = 27

Side = 3 cm

Since, the cross-section that the cube will certainly be a square therefore, the side 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 sections of Cone

A cone is considered a pyramid through a circular cross-section. Depending upon the relationship between the plane and the slant surface, the cross-section or also called conic part (for a cone) might be a circle, a parabola, an ellipse or a hyperbola.


From the over figure, we can see the different cross sections of cone, as soon as a aircraft cuts the cone at a various angle.

Also, see: Conic Sections class 11

Cross sections of cylinder

Depending on just how it has been cut, the cross-section the a cylinder might be either circle, rectangle, or oval. If the cylinder has a horizontal cross-section, then the shape acquired is a circle. If the airplane cuts the cylinder perpendicular to the base, then the shape derived is a rectangle. The oval form is derived when the plane cuts the cylinder parallel come the base v slight variation in that is angle


Cross part of Sphere

We know that of every the shapes, a sphere has the smallest surface ar area for its volume. The intersection that a aircraft figure through a sphere is a circle. Every cross-sections the a sphere space circles.


In the over figure, we have the right to see, if a airplane cuts the ball at various angles, the cross-sections we gain are circles 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 know that when the airplane cuts the cylinder parallel come the base, then the cross-section acquired is a circle.