Perimeter, area and volume · Usually met around P6
Circumference and area of a circle
From “Circumference” to “Areas of semicircles, rings and shapes made with them”, step by step, each skill with its methods, worked examples and answers.
Skills in this topic, easy to hard
- CircumferenceCircumference = 3.14 × diameter
- Area of a circle3.14 × radius × radius: the radius twice
- Circumference and area togetherCircumference = 3.14 × diameter
- Perimeters of semicircles and shapes made with themCurves from the circumference, add every straight edge
- Areas of semicircles, rings and shapes made with themFind the radius first: 3.14 × r × r
Practise it in the game →Circumference and area of a circle · Free to start, unlimited questions, no downloadAll maths topics →