GCSE Maths Practice: surface-area

Question 5 of 10

This question calculates the surface area of a sphere given its radius.

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\( \begin{array}{l}\text{Find the surface area of a sphere with radius } 5\,\text{cm}, \\ \text{giving your answer in terms of } \pi.\end{array} \)

Choose one option:

Use 4πr², check radius, include π in your answer.

The surface area of a sphere = 4πr². For radius 5 cm: 4π × 5² = 4π × 25 = 100π cm². Spheres have continuous curved surfaces, so all points contribute equally. Knowing this formula is essential for applications like sports balls, planet models, and domes. Practice identifying the radius and applying the formula accurately.