# Maths

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• Created by: Alex17
• Created on: 13-12-13 20:58
Circumference of a Circle
Cherry Pie Delicious; Circumference of a circle= πD
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Diameter in a circle
A diameter is a chord that passes through the centre of the circle. (Diameter= radius x2)
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(Diameter * 2) A radius joins the centre of the circle to any point on the circumference of the circle.
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Working Backwards
C= πD eg. 18.2= 3.14...xD 18.2÷3.14...=D=5.79= 5.8 TO 1D.P
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Area of a circle
(Area of a Circle=- Apple Pies Are Too) πr2 eg. πxr2= 3.14... x 52= 78.5cm2
5 of 6
Working Backwards
A= πr2 a÷π= r2 R= Square root of A÷π
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## Other cards in this set

### Card 2

#### Front

A diameter is a chord that passes through the centre of the circle. (Diameter= radius x2)

#### Back

Diameter in a circle

### Card 3

#### Front

(Diameter * 2) A radius joins the centre of the circle to any point on the circumference of the circle.

#### Back ### Card 4

#### Front

C= πD eg. 18.2= 3.14...xD 18.2÷3.14...=D=5.79= 5.8 TO 1D.P

#### Back ### Card 5

#### Front

(Area of a Circle=- Apple Pies Are Too) πr2 eg. πxr2= 3.14... x 52= 78.5cm2

#### Back 