If you are asking what the distance around a rectangle is called, the answer is "perimeter".
that is not the question though is it???
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A rectangle is not an angle at all. It's a flat shape that looks like a box. A rectangle can never have a reflex angle inside it. But it always has four of them on the outside.
I think what you're describing is the circumference.
it is the formula for both a rectangle and a square. remember a square is a rectangle, but a rectangle is not a square (what i mean is a square has to have all 90 degree angles and four sides that are all the same length a rectangle doesn't have all the same lengths. but a rectangle is a shape with all 90 degree angles, and a square fits that discription)
The perimeter of a rectangle is the distance around the rectangle. The area of a rectangle is the space inside the rectangle. To calculate either one you need the length and the width of the rectangle. To calculate the area multiply the length times the width. To calculate the perimeter add the length+width+length+width (that is the distance all the way around)
Ah, what a happy little question! To find the perimeter of a rectangle, you add up all the sides. So for a rectangle that is 7 meters by 6 meters, you would add 7 + 7 + 6 + 6 to get a perimeter of 26 meters. Just imagine all those sides coming together to create a beautiful border around your rectangle!