To figure out the right unit of measurement for 3D shapes, you need to think about what you're calculating.

Volume Measurements

• When you're finding the volume of a 3D shape, you should use cubic units.
• For example, if you measure in centimeters, you will say the volume is in cubic centimeters (cm³).
• If you measure in meters instead, the volume will be in cubic meters (m³).

Surface Area Measurements

• For surface area, you will use square units.
• Surface area shows the total area that covers a 3D shape.
• If your dimensions are in inches, the surface area will be in square inches (in²).
• For measurements in feet, the surface area will be in square feet (ft²).

Practical Application

• It's really important to keep the units the same when you do your calculations.
• For example, if you're changing measurements from yards to inches, make sure you know how to convert them right.
• Remember, there are 36 inches in a yard, so you'd multiply if you need to change yards into inches.

In summary, always use cubic units for volume and square units for surface area. This is key for understanding and sharing your results in geometry. Knowing this helps not only with calculations but also in picturing the sizes and shapes you're working with.