is expressed in square units.

• A. Perimeter
• B. Area
• C. Square
• D. Rectangle

The term that is expressed in square units is Area. This is because area measures the amount of space inside a shape, and it is calculated in square units, such as square meters or square feet.

Understanding the Options

• Perimeter: This refers to the distance around a shape and is measured in linear units, like meters or feet.
• Area: As mentioned, this measures the surface within a shape and is expressed in square units.
• Square: This is a type of shape that has equal sides, but it does not refer to a measurement itself.
• Rectangle: This is another shape with specific properties, but like a square, it does not denote a measurement.

In summary, when discussing measurements in square units, the correct answer is Area.