Mensuration Formulas Flashcards by Malvika Tambe

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

Study These Flashcards

A

1/2πr^2

Q

Perimeter of a Semi-circle

Study These Flashcards

A

πr+2r

Q

Area of a Quadrant

Study These Flashcards

A

1/4πr^2

Periemeter of Quadrant

1/4 X (2πr) + 2r

Area of a Segment

Area of Sector - Area of a Triangle

Distance travelled by a Wheel

Circumference of a circle X number of spins

Km/hr to m/s

5/18

Hectare: Meter^2

1:10,000

Area of a Parallelogram

b X h OR aXbXsinθ

Area of a Ring

π(R^2-r^2)

litre to cm^3

1:1000

Volume of a Cuboid

l X b X h

Volume of a Cube

a^3

Volume of a Cylinder

πr^2h

Volume of a Cone

1/3πr^2h

Slant Height

l^2=r^2 + h^2

Volume of a Sphere

4/3πr^3

Volume of a Hemisphere

2/3πr^3

Volume of of a Prism

Area of Cross Section X Length

Volume of a Pyramid

1/3 X Area of Base X Height

T.S.A of a Cuboid

2(lb+bh+lh)

T.S.A of a Cube

6a^2

C.S.A of a Cylinder

2πrh

T.S.A of a Cylinder

2πr(r+h)

C.S.A of a Cone

πrl

T.S.A of a Cone

πr(r+l)

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

4πr^2

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

3πr^2

S.A of a Prism

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

S.A of a Pyramid

Area of Base + Area of Triangles