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Area and Perimeter : Definition , Formula , Tricks

Area

Area – What is Area ?

Area and Perimeter – General Questions Practice Online Aptitude Test and find out how much you score before you appear for your next interview and written test.

All the shapes have their own properties, based on their structure, sides and angles. The two main features are the area and perimeter. For example, the amount of paint required to paint a wall of rectangular shape is calculated by its area and to put the boundaries of the square field we have to calculate its perimeter to know the total length of the field.

Every geometrical shape has its area and perimeter. There are different formulas for every shape as it has a different measurement. So, let us learn the formula for all shapes, here.

Area and Perimeter Formula

FiguresArea FormulaVariables
Area of RectangleArea = l × wl =  lengthw  = width
Area of SquareArea  = a2a = sides of the square
Area of TriangleArea = 1/2 b×hb = baseh = height
Area of CircleArea = πr2r = radius of the circle
Area of TrapezoidArea = 1/2 (a + b)ha =base 1b = base 2h = vertical height
Area of EllipseArea = πaba = radius of the major axisb = radius of the minor axis

Perimeter Formula for different geometrical figures:

Geometric ShapePerimeter FormulaMetrics
Perimeter of Parallelogram2(Base + Height)
Perimeter of Trianglea + b + ca, b and c being the side lengths
Perimeter of Rectangle2(Length + Width)
Perimeter of Square4aa =Length of a side
Perimeter of Trapezoida +b+c+da, b, c, d being the sides of the trapezoid
Perimeter of Kite2a + 2ba = Length of the first pair of equal sidesb = Length of the second pair of equal sides
Perimeter of Rhombus4 x aa  = Length of a side
Perimeter of Hexagon6 x aa  = Length of a side

Area and Perimeter of Special Triangle

An Equilateral triangle is a special triangle having all the three sides equal. To find its perimeter and area we need to know all the three sides of it.

Area of Equilateral Triangle

  • The perimeter of an equilateral triangle = 3 x length of a side = 3l.
  • Area of an equilateral triangle = √3 / 4 a2

Area and Perimeter online Quiz

[WpProQuiz 143]

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