# Rectangle

A rectangle has equal opposite sides and 4 right angles.

The diagonals of a rectangle are equal.

## Area of a Rectangle

The area of a rectangle is equal to its base multiplied by its height.

### Perimeter of the rectangle

#### Example

Calculate the area and perimeter of a rectangle with a base of 10 cm and a height of 6 cm.

P = 2 · (10 + 6) = 32 cm

A = 10 · 6 = 60 cm^{2}

### Diagonal of a Rectangle

By applying the Pythagorean theorem for one of the triangles, we obtain:

#### Example

Calculate the length of the diagonal of a rectangle with a base of 10 cm and a height of 6 cm.

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