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## Define rectangle - It is a quadrilateral

Area of Rectangle Perimeter of Rectangle Diagonals of Rectangle Difference & Similarity between Square & Rectangle
**Definition:** A rectangle is a quadrilateral whose :-

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

2. Opposite sides are equal and parallel to each other

In the following figure

Angles A, B, C and D = 90 degree

Line AB = CD

Line AC = BD

Line AB // CD

Line AC // BD

Hence, we can say that quadrilateral ABCD is a rectangle.