Recall about a rectangle — lesson. Mathematics State Board, Class 8.

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A rectangle is a four right-angled quadrilateral. All angles in a rectangle are equal to

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

Properties of rectangles:

The first property of a rectangle: The Opposite sides are parallel and equal.

Consider a rectangle

$ABCD$ ,

Opposite sides are parallel:

$AB$

$∥$

$CD$ &

$AC$

$∥$

$BD$ .

Opposite sides are equal:

$AB = CD$ &

$AC = BD$ .

The second property of the rectangle: All the interior angles are

$90°$ .

Consider a rectangle

$ABCD$ .

Interior angles are

$90°$ :

$∠A = ∠B = ∠C = ∠D = 90°$ .

The third property of rectangle: Diagonals bisect each other.

Consider a rectangle

$ABCD$ with diagonals

$AD$ and

$BC$ .

The diagonals

$AD$ and

$BC$ meet at point

$O$ .

Here the point

$O$ dividing the diagonal into two equal parts.

Diagonals bisect each other:

$OA = OD$ and

$OB = OC$ .

Did you find an error?

4. Recall about a rectangle