The radius - The distance from the centre of the circle to the circumference is called what>, The circumference - The 1D measurement around the outside of a circle?, ∏r 2 - The formula to calculate the area of a circle?, The diameter - 2 times the radius, pi (3.14. . . .) - The ratio between radius and circumference of every circle?, 2 times the radius - The formula to calculate the diameter?, The area - The flat 2D measurement of any circle?, units 2 - The area is measured in what?, units - The radius is measured in what?,

Measurement of Circles

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