Perimeter of a Parallelogram: Calculate The Missing Side based on the formula

A parallelogram has a perimeter of 24 cm.

AB = 8

How long is AD?

Since each pair of opposite sides are parallel and equal,

AB is parallel to DC and therefore also AB=DC=8

We will use the given perimeter to find AD and BC (which are also equal and parallel to each other)

Let's calculate the perimeter of the parallelogram:

$24=2AB+2AD$

$24=16+2AD$

$24-16=2AD$

$8=2AD$

We'll divide the two sides by 2:

$\frac{8}{2}=\frac{2AD}{2}$

$AD=4$

$4$

Calculate the value of x in the parallelogram below.

P = Perimeter

3

A parallelogram has a perimeter of 70 cm.

AB = 20 cm

Calculate side CD.

15

Shown below is the parallelogram ABCD, which has a perimeter of 35 cm.

What is the length of the side BC?

8 cm

Calculate the value of X in the parallelogram below.

P = Perimeter

20

A parallelogram has a perimeter of 60 cm.

AB = 20 cm

Calculate the length of the other side.

10

The parallelogram below has a perimeter of 12 cm.

AB = 4 cm

Calculate the length of the other side.

2

A parallelogram has a perimeter of 15 cm.

AB = 5 cm

Calculate side CD.

2.5

A parallelogram has a perimeter of 22 cm.

AB = 8 cm

Calculate the length of side CD.

3

A parallelogram has a perimeter of 20 cm

AB = 7 cm

Calculate the length of the other side.

3

Given the parallelogram whose perimeter is equal to 25 cm and AB=8 cm:

Calculate the other side.

4.5

A parallelogram has a perimeter of 40 cm.

AB = 15 cm

Calculate the length of side CD.

5

A parallelogram has a perimeter of 45 cm

AB = 15 cm

Calculate side CD.

7.5

A parallelogram has a perimeter of 30 cm.

AB = 9 cm

Calculate the length of the other side.

6

Given the parallelogram ABCD whose perimeter is equal to 40 cm, it is also known that X=2

According to the data in the drawing, find a AB

$14$

Calculate X in the parallelogram below.

P = Perimeter

10

Calculate X in the parallelogram shown below.

P = Perimeter

$2\frac{1}{2}$

How long is side BC given that the perimeter of the parallelogram is 30 cm?

$CD=2x$

$15-2x$