Shape A is a semi-circle which has a radius of 12 cm.
Shape B is a circle.
The area of shape A is 8 times the area of shape B.
Show that the radius of shape B is 3 cm.
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Markscheme
Area and Circumference of Circles Questions
14 exam-style questions on Edexcel IGCSE Maths Area and Circumference of Circles. Each one has a worked solution and a mark scheme showing where the marks go.