Maths

What is the equation of a straight line

Y = mx + c

(M gradient and C is y intercept)

What is the relationship between parallel lines and gradients

Parallel lines always have the same gradients

What is the formula to show that two lines are parallel/perpendicular

Y2-Y1 / X2-X1

What is the formula for a trapezium

½ + (a+b) x h

What is the difference between solving inequalities and equations

If you multiply/divide by a negative number the inequality symbol flips over

What is the circle theorem about two tangents

Two tangents from the same point are equal

What is the circle theorem about a tangent in relation to a radius

A tangent meets a radius at 90 degrees

What is the circle theorem about angles in the same segment

Angles in the same segment are equal

What is the circle theorem about opposite angles

Opposite angles in a cyclic quadrilateral add up to 180 degrees

What is the alternate segment theorem

the angle between a chord and a segment is equal to that in a another segment

How to work out the highest common factor

All middle numbers x together

How to work out LCM

all the numbers x together

How to write standard form in minus

Number of 0s is the power

What is the volume of a prism

Area of cross section x length

What is the surface area of a sphere

4 pie r squared

What is the volume of a sphere

4/3 pie r cubed

What is the volume of a cone

1/3 pie r squared h

What is the curved SA of a cone

Pie r l

What is the area of a triangle

½ ab sin C

What is the cosine rule

a squared = b squared + c squared - 2bc cos A

What is the quadratic formula

How to work out speed

Distance/time

How to work out density

Mass/volume

How to work out pressure

Force/area

What is the relationship between the gradients of perpendicular lines

Always negative reciprocal of the other

On indices what does the top and bottom number mean

Top is normal power bottom is square root

How to work out the sum of all interior angles

(N-2) x 180

What is the sum of all exterior angles

360

What is the relationship between interior and exterior angles

Add up to 180

How to work out arc length

0/360 × 2 pie r