# gcse maths

gcse maths

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- Created on: 29-10-10 18:58

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## Pages in this set

### Page 1

GCSE RETAKE REVISION

Maths

Hayley Bull

### Page 2

Maths Revision

The length of the radius of a circle is half the length of its diameter. So, when you are given a radius,

in order to find a circumference you must first double the radius to get the diameter.

To calculate the circumference of the circle with a diameter…

The length of the radius of a circle is half the length of its diameter. So, when you are given a radius,

in order to find a circumference you must first double the radius to get the diameter.

To calculate the circumference of the circle with a diameter…

### Page 3

Pie charts

Add the frequency together and then divide 360 by that amount.

? ÷360

Then the total of that amount time that by the number of items.

Speed, time and distance

Speed= distance ÷ time

Distance = speed x time

Time = distance ÷ speed

Angles

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### Page 5

Angles on a straight line add up to 180°

Percentage

Fraction to a decimal

Divide the top by the bottom then times by 100

Finding a percentage of something

The amount divided by 100 times by the percentage

Shape

Perimeter the edge of the shape

Area inside of…

### Page 6

If a number is below five you round the number down. If the number is five or above you round it

up.

Reciprocals (fraction) simply means one over the other

Place Value

The value of a digit in a whole number depends on its position in the number.

Finding…

up.

Reciprocals (fraction) simply means one over the other

Place Value

The value of a digit in a whole number depends on its position in the number.

Finding…

### Page 7

then the middle value will be one of the data items. A factor of a whole number is any whole number

that divides into it exactly. One is always a factor and so is the number itself.

Translations

Move across first:

Right: positive

Left: negative

Then move up/ down:

Up:…

that divides into it exactly. One is always a factor and so is the number itself.

Translations

Move across first:

Right: positive

Left: negative

Then move up/ down:

Up:…

### Page 8

LOCI

A locus is a path. The path is formed by a point which moves according to some rule.

Simple Loci

EXAMPLE

The locus of a point moves so that it is always a set distance (x) from a fixed point (O). What shape

is it?

Imagine the minute hand…

A locus is a path. The path is formed by a point which moves according to some rule.

Simple Loci

EXAMPLE

The locus of a point moves so that it is always a set distance (x) from a fixed point (O). What shape

is it?

Imagine the minute hand…

### Page 9

Constructions

The locus of a point which moves so that it is an equal

distance from two points, A and B, is the perpendicular

bisector of the line joining A and B.

Perpendicular means at right angles to.

Bisector means cuts in half.

Perpendicular bisector of a line segment

1.…

### Page 10

Number of sides Name of polygon Shape

3 Triangle

4 Quadrilateral

5 Pentagon

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