posted by .

One of a pentagon's sides is 3 feet longer than the other. If the perimeter of the pentagon is 128m, how long is the longest side?

I assume you mean "the others." A pentagon has 5 sides.

4s + s + 3 = 128

5s + 3 = 128

Subtract 3 from both sides.

5s = 125

Divide both sides by 5.

s = 25

s + 3 = ?

## Similar Questions

One of a pentagon's sides is 3 feet longer than the other. If the perimeter of the pentagon is 128m, how long is the longest side?
2. ### Math Geometry

there are 2 pentagons the small pentagon has a side that is 3cm while the side on the other larger pentagon is 8cm. the small pentagon has a side x cm while the same side on the larger pentagon is 5cm. would i set up a proportion 3/x …
3. ### math

consider a square and a regular pentagon. one side of the square is 6 feet longer than a side of the pentagon, and the figures have the same perimeter. what are the lengths of the sides of each figure?
4. ### geometry

A pentagon is a geometric figure with 5 sides. The lengths of the sides of a given pentagon are (6x + 2) cm, (3x + 2) cm, (2x) cm,(3x + 4) cm, and (8x – 4) cm. Which equation below describes the perimeter, P, of the pentagon in terms …
5. ### Math

The perimeter of a regular pentagon is 35in. What is the lenght of one side of the pentagon?
6. ### Multivariable Calculus

A pentagon is formed by placing an isosceles triangle on a rectange. If the pentagon has fixed perimeter P, find the lengths of the sides of the pentagon that maximize the area of the pentagon.
7. ### math

if the perimeter of a pentagon is 60 com, what must its dimensions be to maximize area?
8. ### math

At the Pentagon there are921 feet along each outer side facade and 17.5 miles of corridorS inside it. All sides of the Pentagon are equal. What is the perimeter of the Pentagon
9. ### Geometry

A regular pentagon has side length 12cm.the perimeter of the pentagon is 60cm and the area is 247.7cm2 .a second. Pentagon has side lengths equal to 24cm .find the perimeter of the second pentagon
10. ### math

If a pentagon has five sides. Two sides are three times the length of the shortest side. Two sides are five inches longer than the shortest side. Write and simplify an expression for the perimeter of the pentagon.

More Similar Questions