Given the formula for the perimeter of a rectangle where i represents the length and w represents the width. what does the 2 represent in this formula? 2(l+w)

If you visualize this, or draw a quick picture, or think about perimeter more generally, you might know that perimeter is all of the sides of a shape added up. For a rectangle, you have two longer sides, the length, and two shorter sides, the width. So to find the perimeter you do length + length + width + width. You have four sides, and 2 sets of sides that are of equal length (rules of being a rectangle).

The 2 in 2(l + w) probably just represents that idea, that when you add one "length" side and one "width" side of a rectangle, you can double it to get the perimeter.

last option

step-by-step explanation:

given that δdef is right and isoceles,

assuming that side df is the hypotenuse means that de an ef are the other 2 sides that intersect at 90° and are of equal length.

because they are of equal length, we can say that they are congruent

because they intersect at 90°, their slopes must be opposite reciprocals.

only the last option satisfies these conditions.

12.5 feet

step-by-step explanation: