CBSE Class 8 Maths Revision Notes Chapter 11 – Mensuration

Revision Notes for CBSE Class 8 Maths Chapter 11 – Free PDF Download

Free PDF download of Class 8 Maths Chapter 11 – Mensuration Revision Notes & Short Key-notes prepared by expert Maths teachers from latest edition of CBSE(NCERT) books. All Chapter 11 – Mensuration Revision Notes to help you to revise complete Syllabus and Score More marks.
Maths NCERT Solutions for Class 8

Quick Revision Notes

• Perimeter: Length of boundary of a simple closed figure.
  Perimeter of:
  Rectangle = 2(l + b)
  Square = 4a
  Parallelogram = 2(sum of two adjacent sides)
• Area: The measure of region enclosed in a simple closed figure.
• Area of a trapezium = half of the sum of the lengths of parallel sides × perpendicular distance between them.
• Area of a rhombus = half the product of its diagonals.
• Triangle = 1212 x base x height
• Diagonal of:
  Rectangle = l2+b2−−−−−√l2+b2
  Square = 2a−−√2a
• Surface area of a solid is the sum of the areas of its faces.
• Surface area of:
  
  a cuboid = 2(lb + bh + hl) 
  
  a cube = 6l²
  
  a cylinder = 2πr2πr(r + h)
• Amount of region occupied by a solid is called its volume.
•  Volume of
  a cuboid = l x b x h
  a cube = l³
  a cylinder = ππr²h
• (i) 1 cm³ = 1 ml
• (ii) 1L = 1000 cm³
• (iii) 1 m³ = 1000000 cm³ = 1000L