maths

Bearings are always 3 figures

000, 026, 210

Tell me about equations of a parallel line

Parallel lines always have the same gradient e.g. 4x

Often use Y equals MX plus C or

Y2-Y1 over X2-X1

(Change in Y over change in X)

AQA question

In error intervals don’t forget the sign less than and equal to

In equations of a line:

Y equals MX plus C

Downwards line always is the negative gradient

When shapes are similar what do u use

Scale factors

What is the surface area of a cylinder

Area of cross section × length

Trigonometry

Error intervals

If a number is truncated to a one decimal place it means you just remove all the digits after the first decimal place

E.g.

this decimal:

3.4868

Is truncated to 1dp

So is-

3.4

in error intervals if something has been truncated, you just use the number given and the number above because you can’t go in between i.e. a decimal point

Truncated question

In quadratic graphs, what does roots mean

ROOT MEANS SOLUTION

so ur just finding the solution to i.e.

x squared - 6x+5

So which is on the graph 1 and 5

( basically the points which cross the x axis )

SO ANSWER IS X = 1 and X = 5

On quadratic graphs, what is the turning point?

The turning point is the lowest point in the graph.

(Where the pink arrow is)

In the quadratic graphs does the line of symmetry go through the turning point?

YES IT DOES

What is the equation for the line of symmetry on this graph?

X = 3

In quadratic graphs, there’s another fact!

Can u guess what it is?

Hint - turning point

The x co-ordinate of the turning point will always be in between the two roots

Do this question

Answers on the pic

How do u find the Area of non right angle triangle

½ ABsin( c )

Which graph is this showing

Positive reciprocal graph

What graph is shown here

Negative reciprocal graph

What graph is this

Cubic graph

What is different about the cubic graph

It can go through the lines in the x axis up to 3 times

what graph is this

Positive x*3 graph

What graph is this

Negative x*3 graph

What shape has a quadratic graph got

- U shape

Or

- n shape

What does simultaneously mean

At the same time

For similtaneous equations, how to do u go about it

First find the value of x

Then, find the value of y

What is this type of simultaneous equation called?

ELIMINATION

Where do u apply elimination in simultaneous equations?

Any letter that has the same number in front of it

If the sign your eliminating has a positive and a negative sign then u add the two equations together

ONLY WITH THE ELIMATING VALUE I.e. with this equation its take away NOT ADD

Yes