Gcse Math To Remember

Question 1

The quadratic formula

Answer 1

X = -b +- (square root of) bsquared - 4ac / 2a

Question 2

Determining of number of solutions

Answer 2

Bsquared - 4ac

Question 3

Perpendicular line

Answer 3

Negative reciprocal

Question 4

Area of a circle

Answer 4

Pi r squared

Question 5

Circle perimeter

Answer 5

Pi d / 2 pi r

Question 6

Non right angle triangle labelling

Answer 6

Capital ABC for angles

Opposite sides lower case abc

Question 7

Area of a no right angle triangle

Answer 7

1/2 ab sin c

Question 8

Tan

Answer 8

Opp/adj

Question 9

Volume of a pyramid

Answer 9

1/3 * base area * height

Question 10

Area of a right angle triangle

Answer 10

1/2 * base * height

Question 11

Area of a trapezium

Answer 11

1/2 the sum of the parallel sides * the distance between them

Question 12

Pressure

Answer 12

Force/area

Question 13

Trig sides

Answer 13

Hypotenuse
Opposite
Adjacent

Question 14

Density

Answer 14

Mass/volume

Question 15

Cosine rule

Answer 15

asquared = bsquared+csquared -2bc cos A

Question 16

Pythagoras’ theorem

Answer 16

A squared = b squared + c squared

Question 17

Completed square form

Answer 17

(X+p) squared + q

Question 18

Identity when completing the square

Answer 18

X squared +- 2bx + c == (x+b)squared - bsquared + c

Question 19

Equation of a circle

Answer 19

X squared + y squared = r squared

Question 20

1 litre to cm cubed

Answer 20

1000 cm cubed

Question 21

1 ml to cm cubed

Answer 21

1 cm cubed

Question 22

Turning point from a completed square form

Answer 22

A =x

B = y

Question 23

Surface area of a sphere

Answer 23

4 pi r squared