Geometry and Measures

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Circumference and Area of a Circle and a Sector

Geometry and Measures Circumference and Area of a Circle and a Sector

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  • What is pi?
  • The Circumference of a Circle
  • The Area of a Circle
  • The Arc Length of a Sector
  • The Area of a Sector

📂 Revision Cards

Diagram of the relationship between pi (?) and circumference, with a rolling wheel illustrating the circumference as ? times the diameter, C = ?d.
Circumference of a circle formula using C = 2?r, with an example that r = 5 cm, calculating circumference as 31.4 cm.? is shown as approximately 3.14.
Area of a circle formula A = ?r², with an example that the radius is 3 cm. The area is calculated as approximately 28.26 cm².
Diagram for circle sector, formulas for arc length and area of a sector are given as ?/360 multiplied by 2?r and ?/360 multiplied by ?r² respectively.

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