Which is the length of the missing side?

A quadrilateral is shown with side lengths of 6 yd, 4 yd, 4 yd, 6 yd and blank yd. The perimeter is given as 25 yd.

A.
3 yd

B.
4 yd

C.
5 yd

D.
6 yd

To find the length of the missing side, we can use the fact that the perimeter of a quadrilateral is equal to the sum of all its side lengths.

Let's calculate the perimeter by adding up the given side lengths:
6 yd + 4 yd + 4 yd + 6 yd + blank yd = 25 yd

Now, let's simplify the equation:
20 yd + blank yd = 25 yd

To find the value of blank yd, we can subtract 20 yd from both sides of the equation:
blank yd = 25 yd - 20 yd

Simplifying further, we have:
blank yd = 5 yd

Therefore, the length of the missing side is 5 yd.

The correct answer is option C. 5 yd.