Mensuration Formulas Flashcards by Malvika Tambe | Brainscape

Q

Area of a Scalene Triangle

A

square root of s(s-a)(s-b)(s-c)

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Q

Area of a Triangle

A

1/2 Base X Height OR 1/2 X Side a X Side b X SinTheta

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Q

How to find the ‘S’ for the Artea of a Scalene Triangle

A

a+b+c/2

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Q

Area of an Equilateral Triangle

A

(√3)/4 X a^2

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Q

Perimeter of an Equilateral Triangle

A

3 X a

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Q

Area of a Rectangle

A

l X b

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Q

Diagonal of a Rectangle

A

Root of l^2+b^2

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Q

Perimeter of a Rectangle

A

2(l+b)

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Q

Area of a Rhombus

A

1/2 X d1 X d2

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Q

Perimeter of a Rhombus

A

4 X a

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Q

Area of a Kite

A

1/2 X d1 X d2

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Q

Area of a Trapezium

A

1/2 X (a+b) X h

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Q

Area of a Square

A

a^2 OR diagonal^2/2

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Q

Perimeter of a Square

A

4 X a

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Q

Diagonal of a Square

A

√2 X a

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Q

Area of a Hexagon

A

(3√3 a^2)/2

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Q

Perimeter of a Hexagon

A

6 X a

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Q

Area of a circle

A

πr^2

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Q

Circumference/ Perimeter of a circle

A

2πr OR πd

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Q

Area of Sector

A

θ/360 X πr^2 OR Lenght of Arc X r/2

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Q

Length of Arc

A

θ/360 X 2πr

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Q

Area of Semi-circle

A

1/2πr^2

Q

Perimeter of a Semi-circle

A

πr+2r

Q

Area of a Quadrant

A

1/4πr^2

Q

Periemeter of Quadrant

A

1/4 X (2πr) + 2r

Q

Area of a Segment

A

Area of Sector - Area of a Triangle

Q

Distance travelled by a Wheel

A

Circumference of a circle X number of spins

Q

Km/hr to m/s

A

5/18

Q

Hectare: Meter^2

A

1:10,000

Q

Area of a Parallelogram

A

b X h OR aXbXsinθ

Q

Area of a Ring

A

π(R^2-r^2)

Q

litre to cm^3

A

1:1000

Q

Volume of a Cuboid

A

l X b X h

Q

Volume of a Cube

A

a^3

Q

Volume of a Cylinder

A

πr^2h

Q

Volume of a Cone

A

1/3πr^2h

Q

Slant Height

A

l^2=r^2 + h^2

Q

Volume of a Sphere

A

4/3πr^3

Q

Volume of a Hemisphere

A

2/3πr^3

Q

Volume of of a Prism

A

Area of Cross Section X Length

Q

Volume of a Pyramid

A

1/3 X Area of Base X Height

Q

T.S.A of a Cuboid

A

2(lb+bh+lh)

Q

T.S.A of a Cube

A

6a^2

Q

C.S.A of a Cylinder

A

2πrh

Q

T.S.A of a Cylinder

A

2πr(r+h)

Q

C.S.A of a Cone

A

πrl

Q

T.S.A of a Cone

A

πr(r+l)

Q

T.S.A/ C.S.A of a Sphere

A

4πr^2

Q

T.S.A/C.S.A of a Hemisphere

A

3πr^2

Q

S.A of a Prism

A

(Perimeter of C.S X Length) + (2 X area of C.S)

Q

S.A of a Pyramid

A

Area of Base + Area of Triangles

Q

A

Q

A