maths circumference revision 2.0 / 5 based on 1 rating ? AllAll LevelsAll boards Created by: Sophia HartCreated on: 19-04-13 19:06 What is the circumference of a wheel with a diameter of 50cm? πd = 3.14 × 50 = 157 cm the circumference is 157 cm or do half of the diameter (25cm) then 2 * 3.14 *25 = 157 cm 1 of 5 How do you find the circumference of a circle? If you know the diameter the circumference is pie * the diameter or 2 * pie * the radius 2 of 5 How do you find the area of a circle? Area = π r2 3 of 5 If the diameter of a circle is 20 cm what is the area? (using calculator) If the diameter is 20 cm then the radius must be 10 cm. so the area is pie * 10 * 10 = 314.159 = 312.2 cm 2 4 of 5 next next 5 of 5
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