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Quadrilateral: Overview and Examples | Quantitative Aptitude for SSC CGL PDF Download

Any four points that don't lie on the same line make a quadrilateral; this shape goes by different names based on its form. A quadrilateral is a flat geometric figure with four sides and four corners. Understanding quadrilaterals is essential for various exams like SSC, Railways, AAI, and academic tests. A quadrilateral encompasses shapes like parallelograms, rectangles, squares, rhombuses, trapeziums, and kites, each with unique properties and formulas. These geometric concepts are crucial for competitive exams and academic studies.

Quadrilateral

In geometry, a quadrilateral is a shape with four sides, four angles, and four vertices. It's formed by connecting four points where any three points are not in a straight line. Several types of quadrilaterals exist, including a square, rectangle, parallelogram, rhombus, trapezium, and kite. We'll explore each type in the sections ahead.

Types of Quadrilaterals

The term Quadrilateral originates from a Latin term, where Quadra signifies four and Latus means sides.  A quadrilateral can have four sides that are either the same or different. Examples of quadrilaterals include rectangle, square, trapezoid, and kite, which typically exhibit a four-sided structure. 

 Various types of quadrilaterals are elaborated upon below: 

Parallelogram

Quadrilateral: Overview and Examples | Quantitative Aptitude for SSC CGL

Definition: A quadrilateral with two pairs of opposite sides that are parallel and equal in length.

Properties:
  • Opposite sides are parallel (AB || CD, BC || AD).
  • Opposite sides are equal in length (AB = CD, BC = AD).
  • Diagonals bisect each other.
  • The sum of any two adjacent angles is 180 degrees (∠A + ∠B = 180°, ∠B + ∠C = 180°, etc.).

Rectangle

Quadrilateral: Overview and Examples | Quantitative Aptitude for SSC CGL

Definition: A parallelogram where each angle measures 90 degrees.

Properties:
  • Opposite sides are parallel (AB || CD, BC || AD).
  • Opposite sides are equal in length (AB = CD, BC = AD).
  • All angles are equal to 90 degrees (∠A = ∠B = ∠C = ∠D = 90°).
  • Diagonals bisect each other and are equal in length.

Square

Quadrilateral: Overview and Examples | Quantitative Aptitude for SSC CGL

Definition: A parallelogram with all sides equal and each angle measuring 90 degrees.

Properties:
  • All sides are equal in length (AB = BC = CD = DA).
  • Opposite sides are parallel (AB || CD, BC || AD).
  • All angles are equal to 90 degrees (∠A = ∠B = ∠C = ∠D = 90°).
  • Diagonals bisect each other at right angles and are equal in length.

Rhombus

Quadrilateral: Overview and Examples | Quantitative Aptitude for SSC CGL

Definition: A parallelogram where all sides are equal, and the diagonals bisect each other at right angles.

Properties:
  • All sides are equal in length (AB = BC = CD = DA).
  • Opposite sides are parallel (AB || CD, BC || AD).
  • Opposite angles are equal.
  • Diagonals bisect each other perpendicularly.

Trapezium

Quadrilateral: Overview and Examples | Quantitative Aptitude for SSC CGLDefinition: A quadrilateral with only one pair of opposite sides that are parallel.

Properties:
  • Only one pair of opposite sides are parallel (AB || CD).
  • The non-parallel sides are called the legs of the trapezium.
  • The diagonals do not bisect each other in the same ratio.

Kite

Quadrilateral: Overview and Examples | Quantitative Aptitude for SSC CGLDefinition: A quadrilateral with two pairs of adjacent sides that are equal in length.

Properties:

  • Two pairs of adjacent sides are equal (AB = AD, BC = CD).
  • The diagonals intersect at right angles.
  • One of the diagonals bisects the other.

Quadrilateral Formula 

  • Shapes: We previously talked about square, rectangle, parallelogram, rhombus, trapezium, and kite with a detailed illustration.
  • Formulas: Let's now understand the fundamental equations connected to these shapes. Area and perimeter represent the basic formulas for different four-sided figures. The following are the formulas:
    • Area: The space inside a shape.
    • Perimeter: The total length of the boundary of a shape.

Perimeter of Quadrilateral

  • The perimeter refers to the total distance around the edge of any flat shape.
  • In a four-sided shape (quadrilateral), the perimeter is the sum of all four side lengths.
  • Various types of quadrilaterals have different perimeters.

Note: The perimeter is the total distance around the edge of a 2D shape, like a square or rectangle. For a quadrilateral, which is a shape with four sides, the perimeter is the sum of all four side lengths. Different types of quadrilaterals have different perimeters based on their side measurements.

ShapeFormula for Perimeter
Parallellogram
  • 2 × (sum of lengths of adjacent sides).
  • 2 × (Base + Side)
Rectangle
  • 2 x (L + B) = 2 × (Length + Breadth)
Square
  • 2 × (a + a) = 4a (4 times the side length)
Rhombus
  • 4x (where x is a side)
Trapezium
  • Sum of lengths of all the sides
Kite
  • 2 x (side length one + side length two)
  • 2 (x + y) (where, x and y denote adjacent pairs

Area of Quadrilateral

The area of a four-sided shape is the total space it takes up. Here are the area formulas for different shapes:
  • Square: All sides are equal. Area = side x side
  • Parallelogram: Opposite sides are parallel. Area = base x height
  • Rectangle: Opposite sides are equal and all angles are 90 degrees. Area = length x width
  • Rhombus: All sides are equal, opposite angles are equal. Area = (diagonal1 x diagonal2) / 2
  • Trapezium: One pair of parallel sides. Area = 0.5 x (sum of parallel sides) x height
  • Kite: Two pairs of adjacent sides are equal. Area = 0.5 x (diagonal1 x diagonal2)
ShapeArea
Parallelogramb × h (base × height)
RectangleLength × Breadth ( L × B)
Squarea2 (side length squared)
Rhombus1/2×d1×d2 (where length of two diagonals of the is d1 and d2)
Trapezium1/2×(Addition of lengths of parallel sides)×h (where, ‘h’ represents the height)
Kite
1/2×Diagonal1×Diagonal2


Sides and Angles of Quadrilaterals

Learn about key facts on sides and angles of parallelogram, rectangle, square, rhombus, and trapezium.

  • Opposite sides run alongside each other and look the same with lines from corner to corner cutting each other into two.
  •  The angles have different measurements, but the opposite angles are of the same size.
ShapeSidesAngles
Parallelogram
  • Opposite sides run alongside each other and look the same with lines from corner to corner cutting each other into two.
  • The opposite angles in a parallelogram are equal. Also, the summation of two adjacent angles is 180 degrees
Rectangle
  • Opposite sides are parallel and equivalent with diagonals bisecting each other
  • All angles in a rectangle are equal.
  • The total of adjacent angles in a rectangle equals 180 degrees.
Square
  • All sides of a shape are the same length.
  • Opposite sides run parallel to each other.
  • Diagonals cut each other exactly in half.
  • In a square, all angles are equal at 90 degrees.
  • Additionally, the sum of adjacent angles equals 180 degrees.
Rhombus
  •  All the four sides are equal and the opposite side is parallel to one another with diagonals bisecting one another.
  • The angles have different measurements, but the opposite angles are of the same size.
Trapezium
  • All sides are of different lengths in such a way that one pair of opposite sides is parallel.
Isosceles trapezium
  • The non-parallel sides are of identical length

Properties of Quadrilaterals

Common Properties of Quadrilaterals:
  • Quadrilaterals have four sides.
  • Quadrilaterals have four vertices.
  • Quadrilaterals have two diagonals.
  • The total of all interior angles is 360 degrees.
Properties of Each Type of Quadrilateral:
  • Rectangle
  • Parallelogram
  • Rhombus
  • Square
  • Trapezoid
  • Kite
ShapeProperties
Square
  • Every side of the square is of the same length.
  • The sides of a square run parallel to each other.
  • All the inside angles of a square are right angles (90 degrees).
  • The diagonals of a square intersect each other at right angles.
Rectangle
  • The sides of a rectangle that face each other have the same length.
  • The sides of a rectangle that face each other are parallel.
  • All the inside corners are right angles (90 degrees).
  • The lines that go from one corner of a rectangle to the opposite corner cross each other in the middle.
Rhombus
  •  All sides of a rhombus are of the same length.
  • Opposite sides of the rhombus run parallel to each other.
  • Opposite angles are of the same size.
  • The total of any two adjacent angles in a rhombus equals 180 degrees.
  • The diagonals intersect each other at right angles.
Parallelogram
  • Opposite sides of a parallelogram have the same size.
  • Opposite sides run in the same direction and never meet.
  • The lines connecting opposite corners of a parallelogram cut each other in half.
  • The angles facing each other on opposite sides are equal.
  • The sum of two angles next to each other in a parallelogram equals 180 degrees.
Trapezium
  • Only one pair of opposite sides in a trapezium run parallel to each other.
  • The two sides next to each other in a trapezium together form a straight line, totaling 180 degrees.
  • The diagonals of a trapezium cut each other neatly into equal parts.
Kite
  • Pair of adjacent surfaces of a kite have the same size.
  • The longest diagonal of a kite divides the shortest one.
  • Only one pair of opposite angles are the same size.

Solved Examples on Quadrilateral


  • A polygon is a flat shape with many sides. For instance, a shape with three sides is called a 3-gon, and one with four sides is known as a 4-gon.
  • This article focuses on quadrilaterals, which are polygons with four sides. The total angles inside a quadrilateral add up to 360 degrees.
  • Here are some solved examples of quadrilaterals.

Example 1 : Obtain the perimeter of the quadrilateral with sides 6 cm, 7 cm, 8 cm and 13 cm.

Quadrilateral: Overview and Examples | Quantitative Aptitude for SSC CGL  View Answer

Solution: Given, the measures of 4 different sides are 6 cm, 7 cm, 8 cm, and 13 cm.

  • As known to us the perimeter will be equivalent to the summation of the length of all four sides. That is:
  • P(perimeter)= 6 cm+7 cm+8 cm + 13 cm= 34 cm

Example 2 : If the two diagonals of a kite are of length 22 cm and 6 cm then what is the respective area.

Quadrilateral: Overview and Examples | Quantitative Aptitude for SSC CGL  View Answer

Solution: The area of a Kite=1/2×Diagonal1×Diagonal2 = 
12×22×6

Hence, the area of a Kite=66 square metres.

Example 3 :Determine the perimeter of the parallelogram whose opposite sides are 13 cm and 6 cm respectively.

Quadrilateral: Overview and Examples | Quantitative Aptitude for SSC CGL  View Answer

Solution: As per the property of a parallelogram, the opposite sides have identical lengths. Thus,

Perimeter = 13 cm + 6 cm + 13 cm + 6 cm = 38 cm

Example 4 : What is the base of a rectangle having an area of 72 square units and the height is 8 units.

Quadrilateral: Overview and Examples | Quantitative Aptitude for SSC CGL  View Answer

Solution:

Given data:

  • Area = 72 square units
  • Height = 8 units
  • Area of rectangle = Base × Height
  • 72 = Base × 8
  • Base = 72/8 = 9 units

The document Quadrilateral: Overview and Examples | Quantitative Aptitude for SSC CGL is a part of the SSC CGL Course Quantitative Aptitude for SSC CGL.
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FAQs on Quadrilateral: Overview and Examples - Quantitative Aptitude for SSC CGL

1. What are the different types of quadrilaterals?
Ans. The different types of quadrilaterals include parallelograms, rectangles, squares, rhombuses, trapezoids, and kites.
2. What is the formula to find the perimeter of a quadrilateral?
Ans. The formula to find the perimeter of a quadrilateral is to add up the lengths of all four sides of the quadrilateral.
3. How do you calculate the area of a quadrilateral?
Ans. The area of a quadrilateral can be calculated by using various formulas depending on the type of quadrilateral. For example, the area of a rectangle is calculated by multiplying its length and width.
4. What is the relationship between the sides and angles of a quadrilateral?
Ans. In a quadrilateral, the sum of all interior angles is always equal to 360 degrees. The sides of a quadrilateral can vary in length and do not have a specific relationship with the angles.
5. Can a quadrilateral have equal sides and angles?
Ans. Yes, a quadrilateral can have equal sides and angles. For example, a square is a type of quadrilateral with four equal sides and four right angles.
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