The sum of the lengths of all its sides.
APEX
Chat with our AI personalities
You can do this by simply adding all of the lengths of the sides.
The perimeter.
a + b + c + d
the sum of the lengths of all its sides
The perimeter of a rectangle, like the perimeter of any closed two-dimensional figure, is the distance around it. The perimeter of the rectangle is the sum of two lengths plus two widths.