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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

Chapter NameMensuration
ChapterChapter 11
ClassClass 8
SubjectMaths Revision Notes
BoardCBSE
TEXTBOOKCBSE NCERT
CategoryRevision Notes

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 cm= 1 ml
  • (ii) 1L = 1000 cm3
  • (iii) 1 m3 = 1000000 cm3 = 1000L