The coordinates for side BC in polygon ABCD are (2,5) and (5,5). What is the length of side BC?

A.
3 units

B.
5 units

C.
7 units

D.
10 units

To find the length of side BC, we use the distance formula:

d = √((x2 - x1)^2 + (y2 - y1)^2)

Given the coordinates (2,5) and (5,5) for points B and C respectively:

d = √((5 - 2)^2 + (5 - 5)^2)
d = √(3^2)
d = √9
d = 3 units

Therefore, the length of side BC is 3 units.

So, the correct answer is:

A. 3 units