formula

Question 1

area of a circle

Answer 1

a=r^2pie (apple pies are too)

Question 2

circumference of a circle

Answer 2

c=dpie (cherry pies delicious)

Question 3

volume of a cylinder

Answer 3

cv=r^2pieh (Cerys’ vegetable pies ready to heat)

Question 4

speed, distance, time

Answer 4

speed = distance/time,
distance= time x speed,
time= distance/speed

Question 5

mass, density, volume

Answer 5

density= mass/volume,
volume= mass/density
mass= volume x density

Question 6

area of a triangle

Answer 6

(base x height) /2

Question 7

area of trapezium

Answer 7

1/2(sum of parallel sides) x h

Question 8

trigonometry

Answer 8

soh cah toa

Question 9

trigonometry using soh

Answer 9

opp= sin(n) x hyp,
sin(n)=sin-1(opp/hyp),
hyp= opp/sin(n)

Question 10

trigonometry using cah

Answer 10

adj = cos(n) x hyp,
cos(n)= cos-1(adj/hyp),
hyp= adj/cos(n)

Question 11

trigonometry using toa

Answer 11

opp = tan(n) x adj,
tan (n) = tan-1(opp/adj),
adj= opp/tan(n)

Question 12

straight line equation

Answer 12

y=mx+c (m is gradient, c is y-intercept)

Question 13

gradient

Answer 13

diff in y / diff in x

Question 14

equation which makes circle on a graph

Answer 14

x^2 + y^2 = r^2

e.g. x^2 + y^2 = 25 will form a circle with a radius of 5 around point (0,0)