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## Define square - It is a quadrilateral

Area of square Perimeter of Square Diagonals of Square Construction of Square with Compass
**Definition** : A Square is a quadrilateral whose :-

1. All angles are of 90 Degree (right angled at each vertex)

2. Opposite sides are parallel to each other

3. All sides are of equal length

Angles P, Q, R and S = 90 degree

Line PQ = QR = RS = SP = 5 cm

Line PQ // RS

Line PS // RQ

Hence, we can say that quadrilateral PQRS is a square.