Mensuration is derived from the Greek word “Mensuration” meaning “to measure”. There are 2 topics covered under this section:

a) Area of a triangle using Heron’s formula (without proof) and its application in finding the area of a quadrilateral.

b) Surface areas and volumes of cubes, cuboids, spheres (including hemispheres) and right circular cylinders/cones.

Click on each topic to know more details.

Area – Heron Formula
Key topics include:

• Introduction
• Area in Terms of Base & Altitude
• Area in Terms of Base & Sine of Angles
• Area in Terms of Coordinates of Vertices
• Area by Heron’s Formula
• Rectangle
• Square
• Parallelogram
• Rhombus

Surface Area and Volume of Solids
Key topics include:

• Introduction
• Solid
• Volume of a Solid
• Cuboid & Cube
• Cuboid
• Surface Area of a Cuboid
• Volume of a Cuboid
• Cube
• Surface Area of a Cube
• Volume of a Cube
• Right Circular Cylinder
• Solid Cylinder
• Surface Area of a Cylinder
• Volume of a Cylinder
• Hollow Cylinder
• Surface Area of a Hollow Cylinder
• Volume of a Cylinder
• Right Circular Cone
• Definition
• Surface Area of a Cone
• Volume of a Cone
• Sphere
• Solid Sphere
• Surface Area of a Sphere
• Volume of a Sphere
• Hemisphere
• Surface Area of a Hemisphere
• Volume of the Hemisphere
• Spherical Shell (Hollow Sphere)
• Surface Area of a Spherical Shell
• Volume of the Spherical Shell

#### Related Courses

As per CBSE syllabus, the only chapter under this topic is Number System. Key topics...

There are 2 courses under Grade 9 Algebra for CBSE : Polynomials and Linear Equations...

Data can be defined as a collection of facts such as values or measurements. It can...

### Coordinate Geometry- Grade 9 CBSE

As per CBSE syllabus, the only chapter under this topic is Basic Concepts – Coordinate...