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TYPES OF QUADRILATERALS
Quadrilaterals
Parallelogra
m
Square
Rectangl
e
Trapeziu
m
Rhombus
PROPERTIES OF PARALLELOGRAMS
1. Opposite sides are equal.
2. Opposite angles are equal.
3. Co-interior angles are supplementary.
4. If one angle is a right angle, then all the angles will be a
right angle.
5. Diagonals bisects each other.
6. A diagonal bisects it into two congruent triangles.
Parallelogram
PROPERTIES OF RHOMBUS
1. All sides are equal.
2. Opposite angles are equal.
3. Diagonals bisect each other at right angles.
4. Co-interior angles are supplementary.
D
A
C
B
Rhombus
PROPERTIES OF SQUARE
1. All sides are equal.
2. All angles are a right angle.
3. Diagonals bisect each other at right angles.
4. All diagonals are equal.
5. Opposite sides are equal and parallel.
D
A
C
B
Square
PROPERTIES OF TRAPEZIUM
1. A trapezium is special type of QUADRILATERAL in which
only one pair of opposite sides is Parallel.
2. Here AB||CD.
3. BUT, AD is not parallel to BC.
4. Since a parallelogram has both the opposite pair of sides
equal and parallel, Therefore a TRAPEZIUM is not a
Parallelogram.
D
A
C
B
Trapezium
PROPERTIES OF RECTANGLE
1. Opposite sides are equal.
2. Opposite angles are equal.
3. Opposite sides are parallel.
4. Diagonals are equal.
5. All the angles are right angles.
Rectangle

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Understanding quadrilateral

  • 1.
  • 2.
  • 4. PROPERTIES OF PARALLELOGRAMS 1. Opposite sides are equal. 2. Opposite angles are equal. 3. Co-interior angles are supplementary. 4. If one angle is a right angle, then all the angles will be a right angle. 5. Diagonals bisects each other. 6. A diagonal bisects it into two congruent triangles. Parallelogram
  • 5. PROPERTIES OF RHOMBUS 1. All sides are equal. 2. Opposite angles are equal. 3. Diagonals bisect each other at right angles. 4. Co-interior angles are supplementary. D A C B Rhombus
  • 6. PROPERTIES OF SQUARE 1. All sides are equal. 2. All angles are a right angle. 3. Diagonals bisect each other at right angles. 4. All diagonals are equal. 5. Opposite sides are equal and parallel. D A C B Square
  • 7. PROPERTIES OF TRAPEZIUM 1. A trapezium is special type of QUADRILATERAL in which only one pair of opposite sides is Parallel. 2. Here AB||CD. 3. BUT, AD is not parallel to BC. 4. Since a parallelogram has both the opposite pair of sides equal and parallel, Therefore a TRAPEZIUM is not a Parallelogram. D A C B Trapezium
  • 8. PROPERTIES OF RECTANGLE 1. Opposite sides are equal. 2. Opposite angles are equal. 3. Opposite sides are parallel. 4. Diagonals are equal. 5. All the angles are right angles. Rectangle