GCSE Maths Practice: circle-properties

Question 9 of 10

This question tests knowledge of the semicircle's circumference.

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\( \begin{array}{l}\text{A semicircle has radius 9 cm.}\\ \text{Find its curved circumference to 1 decimal place.}\end{array} \)

Choose one option:

Use half of 2πr for the curved part of a semicircle.

This question involves calculating the circumference of a semicircle. Students must understand that a semicircle is half a circle plus the diameter if required. It tests understanding of fractional parts of circles and reinforces the use of π. Practising semicircle problems builds flexibility in geometric reasoning and prepares students for sector, segment, and composite shape problems.