Calculate the Perimeter of Parallelogram ABCD with Side Length 10

To find the perimeter of the parallelogram ABCD, we will use the formula for the perimeter of a parallelogram:

• The formula for the perimeter $P$ is $P = 2 \times (\text{length of one base} + \text{length of one side})$.

Given that:

• The length of the base (either AB or CD) is $X$.
• The length of the side (either AD or BC) is 10.

Substituting these values into the formula for the perimeter, we get:

Distribute the 2:

Therefore, the perimeter of parallelogram ABCD is $2X + 20$.

The correct answer, as per the choices given, is choice 4: $2x+20$.