GCSE Maths Practice: circle-properties

Question 1 of 10

This question teaches how to calculate the diameter from the radius of a circle.

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\( \begin{array}{l}\text{A circle has a radius of 5 cm.}\\ \text{Find the diameter.}\end{array} \)

Choose one option:

Multiply the radius by 2 to get the diameter; always check units.

The diameter of a circle is twice the radius. For a radius of 5 cm, the diameter is 10 cm. Understanding the relationship between radius and diameter is fundamental for circle geometry. Practising these calculations helps students solve problems involving circumference and area. Visualising the circle, marking the radius, and doubling it reinforces the concept. Accurate calculation of the diameter is important in constructions, measurements, and real-life applications such as engineering, design, and navigation. Mastery ensures confidence in identifying and using circle properties correctly.