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Mensuration: Rectangle

MENSURATION: RECTANGLE


In mathematics, a rectangle represents a closed geometrical shape which has four sides and four right angles, right angle means 90 degrees.

Properties of Rectangle

  1. l is the length and w is the width of the rectangle
  2. d is the diagonal of the rectangle
  3. All internal angle is 90 degree
  4. Parallel side are equal

Important Formula for Rectangle

Area Of Rectangle (A)

Area(A) = Length(l) X Width(w)
Example: Calculate the area of whose length is 4cm and with is 3cm
Given: Length(l) = 4cm
            Width(w) = 3cm
Formula:
           Area(A) = Length(l) X Width(w)
           Area(A) = 4cm X 3cm
          Area(A) = 12 cm^2
Area of given rectangle is 12 cm^2

Perimeter of Rectangle(P)

Perimeter(P) = 2 x (Length(l) + Width(w))
Example: Calculate the perimeter of whose length is 4cm and with is 3cm
Given: Length(l) = 4cm
            Width(w) = 3cm
Formula:
            Perimeter(P) = 2 x (Length(l) + Width(w))
            Perimeter(P) = 2 x (4cm + 3cm)
            Perimeter(P) = 2 x 7cm
            Perimeter(P) = 14 cm  
The perimeter of the given rectangle is 14 cm

Diagonal of Rectangle(D)

Diagonal(D) = Sqrt(Length(l)^2 + Width(w)^2)
Example: Calculate the diagonal of whose length is 4cm and with is 3cm
Given: Length(l) = 4cm
            Width(w) = 3cm
Formula:
            Diagonal(D) = Sqrt(Length(l)^2 + Width(w)^2)
            Diagonal(D) = Sqrt(4cm^2 + 3cm^2)
            Diagonal(D) = Sqrt(16cm^2+9cm^2)
            Diagonal(D) = Sqrt(25cm^2)
            Diagonal(D) = 5cm
Diagonal of given rectangle is 5 cm

Please write comments if you find anything incorrect, or you want to share more information about the topic discussed above.


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