Properties of Quadrilateral :

b) The opposite angles are equal.( ∠A = ∠C and ∠ B = ∠D)

c) The adjacent angles are supplementary.( ∠A + ∠B= 180)

d) The diagonals bisect each other.( AO = OC and BO = OD).

AD = BC also AB || CD and AD || BC)

b) Each angle is a right angle.( ∠A = ∠B = ∠ C = ∠D = 90

c) Diagonals are equal.(AC = BD)

d) Diagonals bisect each other. (AO = OC and BO = OD)

all angles are 90

b) Each angle is right angle.

c) Diagonal are equal and bisect each other at right angle.

c) Opposite angles are equal.

d) Adjacent angles are supplementary( adds up to 180)

e) Diagonals bisect each other at right angle.

AB || CD

∠3 + ∠4 = 180)

b) Diagonals intersect each other at right angle.( AC bisect BD)

c) BO = OD

• Introduction to Quadrilateral

• Types of Quadrilateral

• Properties of Quadrilateral

• Parallelogram and its Theorems

• Rectangle and its Theorems

• Square and its Theorems

• Rhombus and its Theorems

• Trapezoid (Trapezium)and its Theorems

• Kite and its Theorems

• Mid Point Theorem