LEARN FORMULAS FOR DIFFERENT POLYGONS: PART 1

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RECTANGLE

Area = Length x Width (A = LW)

Perimeter = (Length + Width) x 2

Width = Area ÷ Length

Length = Area ÷ Width

Width = P/2 - Length

Length = P/2 – Width

 

SQUARE

Area by using its side = side x side

Area by using its diagonal = ½ x d²

Perimeter = side x 4

Side = Perimeter ÷ 4

Side = Square root of the area

Width = P/2 - Length

Length = P/2 – Width

 

TRIANGLE

 

Area = ¹/₂bh

Perimeter = sum of all sides surrounding the triangle

Height = (Area x 2) ÷ base

Base = (Area x 2) ÷ Height

Pythagoras theorem: a² + b² = c² (a = height, b=base and c=hypotenuse)

 

PARALLELOGRAM

 

Area = Base x height

Base = Area ÷ Height

Height = Area ÷ Base

 

RHOMBUS

 

Area = ½ x d₁ x d₂ (d₁ and d₂ are diagonals of rhombus)

 

TRAPEZIUM (TRAPEZOID)

Area = 1/2h(a+b) or (a+b) ÷2 x h

Length a = [(area x 2) ÷ h] – b

Length b = [(area x 2) ÷ h] – a

Height = (area x 2) ÷ (a+b)

 

KITE

Area = ½ x d₁ x d₂ (d₁ and d₂ are diagonals of a Kite)

 

********* END OF PART ONE **********
Click here for Part two

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In case of any question or comment be free to write down:
A lot of Thanks

Mr. Yahya M (Badshah)