The perimeter of the rectangle is 86 in. Length 19 in. Calculate its area.

The perimeter is the sum of the lengths of all sides. In a rectangle there are 2 of the same length and width. We need to find the area of ​​the rectangle.

What is given to us:

– rectangle perimeter = 86 dm

– length of 1 rectangle = 19 dm

– length of 2 rectangles = 19 dm

Find the sum of the lengths of the rectangle:

1) 19 * 2 = 38 dm

Now let’s find the sum of the width of the rectangle by subtracting the sum of the lengths:

2) 86 – 38 = 48 dm

Let’s find what each width of the rectangle is equal to:

3) 48/2 = 24 dm

We need to know the area of ​​the rectangle. To do this, we multiply the length by the width:

4) 24 * 19 = 456 dm ^ 2

Answer: 456 dm ^ 2 (squared) is the area of ​​a rectangle.