On this page, you will find Mensuration Class 8 Notes Maths Chapter 11 Pdf free download. CBSE NCERT Class 8 Maths Notes Chapter 11 Mensuration will seemingly help them to revise the important concepts in less time.

## CBSE Class 8 Maths Chapter 11 Notes Mensuration

### Mensuration Class 8 Notes Conceptual Facts

1. Area of rectangle

A = Length x Breadth

= a x b sq. units

2. Area of square

A = (side)^{2}

= a^{2} sq. units

3. Area of triangle

A = \(\frac{1}{2}\) x b x h sq.units

4. Area of equilateral triangle

A = \(\frac{\sqrt{3}}{4} a^{2}\) sq.units

5. Area of parallelogram

A = b x h sq. units

6. Area of Circle

A = πr^{2} sq. units

7. Area of trapezium

A = \(\frac{1}{2}\)(a + b) x h sq. units

8. Area of general quadrilateral

A = Area of ΔABC + area of ΔACD

= \(\frac{1}{2}\) (a + b) x AC sq. units

9. Area of rhombus

A = \(\frac{1}{2}\) (d_{1 }x d_{2}) sq. units

10. Surface area of cube

A = 6a^{2} sq. units

11. Surface area of cuboid

A = 2 [ab + bc + ca] sq. units

12. Surface area of cylinder

A = 2πrh sq. units

13. Volume of cube V = a^{3} units

14. Volume of cuboid V = a x b x c cu. units

15. Volume of cylinder V = πr^{2}h