# math

posted by .

how to make a parallellagram with a base of 8cm and perimeter is 28cm?

• math -

P = 2L + 2W

28 = (2 * 8) + 2W

28 = 16 + 2W

12 = 2W

? = W

## Similar Questions

1. ### Geometry HELP

The lateral surface area of a regular pyramid is 160 cm2 and the perimeter of the base is 40 cm. What is the slant height?
2. ### math

how many rectangle whose perimeter is 28cm?
3. ### Math

A photo width of 8cm, length of 14cm .if the perameter of photo is increased by 5o % , which dimension is for new perimeter. options are: 16cm by 28cm 12cm by 21cm 4cm by7cm 8cm by28 cm i chose the first option cuz it increased 50.but …
4. ### algebra

One side of a trianle is 2cm shorter than the base,x. The other side is 8cm longer than the base. What lenghts of the base will allow the perimeter of the trianlge to be at least 30cm
5. ### Math

The area of a rectangle is shown below The area of the rectangle is 56 Which of the following are possible values for the length and width of the rectangle?
6. ### maths

the perimeter of an isosceles triangle is 28cm with sides 4y = 6y-2x+1 and base x+2y all in cm .find x and y and hence state the lengths of the sides of the triangle. solution. 4y = 6y-2x+1. ; -2y+2x=1.also altitude = |4y|^2=x^2+ |x+2y|^2 …
7. ### Geometry

1. The perimeter of an isosceles triangle is 50cm and the length of the altitude to the base is 5cm. Find the length of the base. 2. In quadrilateral QRST: TQ=8cm; (angle)R=60; (angle)T=90; QR=RS; ST=8cm. Find the exact length of the …
8. ### Geometry

I have a model of a triangle shaped pyramid with sides 6cm base 8cm and height 7cm. If I enlarge the pyramid using a scale factor of 1.2, what will the new perimeter and area be?
9. ### math

the perimeter of a isosceles triangle is 28cm with side 4y=6y-2x+1 and base x+2y in cm, find x and y and state the length of the side of the triangle.
10. ### Pre algebra

Expression in simplest form that represents the perimeter of a polygon that is 8cm 9x 8cm 9x

More Similar Questions