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Mensuration chapter all Formulas class 9|Surface area and volume class 9

Mensuration chapter all Formulas class 9


Hey! Friends there are all important formula of mensuration class 9 is listed 👇 below.

Mensuration chapter all Formulas class 9 will help you a lot in solving the problem of Mensuration chapter.

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CUBOID
Cuboid


Total surface area of cuboid

=2(lb+bh+hl)
Where,
 l=length
b=breadth
h=height

Area of 4 wall/Lateral surface area of cuboid

=2h(l+b)
Where,
 l=length
b=breadth
h=height

Volume of cuboid

=lbh

Where,
 l=length
b=breadth
h=height

Diagonal of cuboid

√( l2 + b2 +h2)
Where,
 l=length
b=breadth
h=height

Edge of cuboid

=12a
Where,
a=side



                            CUBE

Cube




Total surface area of Cube

=6a2 (6*side square)

Area of 4 wall/Lateral surface area of cube

=4a2(4*side square)

Volume of cube

=a^3(side cube)

Diagonal of cube

=✓3a

Length of all edges of cube

=4(l+b+h)
Where,
 l=length
b=breadth
h=height


                     CYLINDER



Cylinder



Curved surface area of cylinder

=2πrh
Where,
r=radius
h=height

Total surface area of cylinder

=2πr(h+r)
Where,
r=radius
h=height

Volume of cylinder

=πr2h(pie* radius square *height)
Where,
r=radius
h=height

Volume of hollow cylinder

=π(R^2-r^2)h
Where,
r=radius
h=height


                  CONE



Cone Shape
Cone Diagram with h = height and r = radius and s = slant height
Cone



r = radius
h = height
s = slant height
V = volume
L = lateral surface area
B = base surface area
A = total surface area
π = pi = 3.1415926535898
√ = square root

Volume of a cone:

V = (1/3)πr2h

Slant height of a cone:

s = √(r2 + h2)

Lateral surface area of a cone:

L = πrs = πr√(r2 + h2)

Base surface area of a cone (a circle):

B = πr2

Total surface area of a cone:

A = L + B = πrs + πr2 = πr(s + r) = πr(r + √(r2 + h2)


               


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