Introduction to rectangle — lesson. Mathematics CBSE, Class 7.

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A rectangle is a quadrilateral with four right angles. In a rectangle, all the angles are equal

$(360°/4 = 90°)$ . Furthermore, the opposite sides are parallel and equal, and diagonals bisect each other.

Properties of rectangles:

First Property of a rectangle: Opposite sides of a rectangle are equal and parallel.

$AB =$

$DC$ &

$BC =$

$DA$

Hence, Opposite side are equal and parallel

The Second property of the rectangle: All the angles of a rectangle are

$90°$ .

Let us consider a rectangle

$ABCD$ .

$∠A =$

$∠B =$

$∠C =$

$∠D$
Hence, each angle of a rectangle measures

$90°$ .

The third property of rectangle: Diagonals of a rectangle bisect each other.

In rectangle

$ABCD$ , diagonals bisect the angles.

$OA =$

$OC$ and

$OB =$

$OD$
Thus the diagonals bisect each other in a rectangle.

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1. Introduction to rectangle