Congruent rectangles are those that have the same area and the same perimeter.

**Let's look at an exercise as an example: **

Given the rectangles $ABCD$ and $KLMN$, as described in the following scheme:

Observe the data that appears in the scheme and determine if they are congruent rectangles.

**In the first rectangle we see the following: **

$AB=7$

$BC=5$

$P=24$

$A=35$

**That is, the perimeter is equal to** $24$** and the area, to** $35$**.**

**In the second rectangle we see the following: **

$KL=8$

$LM=4$

$P=24$

$A=32$

**That is, the perimeter is equal to** $24$** and the area, to** $32$**.**

Both rectangles have **the same perimeter,** but their **area is different.**

Therefore, **they are not congruent.**