GCSE Maths Practice: volume

Question 7 of 10

This question checks which measurements are needed to calculate volume of a cuboid.

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\( \begin{array}{l}\text{Which measurement is NOT needed to calculate the volume of a cuboid?}\end{array} \)

Choose one option:

Use only perpendicular sides for volume. Ignore diagonals.

To calculate volume, we need the three perpendicular sides: length, width, and height. The diagonal measures across corners and is not needed. For example, a cuboid 5×3×2 cm has volume V = 5×3×2 = 30 cm^3. Understanding which dimensions to use prevents mistakes. In real-life, measuring boxes or packages, you only use straight sides. Practice identifying necessary measurements and ignoring unnecessary ones like diagonals. Always include cubic units.