Maths equations Flashcards
some are in the exam paper in higher but still worth learning, also some apply to physics aswell
what is the formula for the area of a triangle
A= BxH/2 (/ = divded)
what is the formula for the area of a circle
A= πxr^2 (^ = making a number squared etc)
what is the formula for the circumference of a circle
C = πxD
what is the formula for the area of a trapezium
A = top + bottom /2 x height
what is the formula for the area of a parallelogram
A= b x h
what is the formula for the volume of a cylinder
V = cross section ( π x r ^2) x height
what is the formula for pythagoras theorem
c^2 = a^2+b^2
c squared = a squared + b squared to find out C you do the square root
whats the formula for the cosine rule
IN EXAM PAPER FOR HIGHER
a^2= b^2+c^2-2bcCosA
saerch up an image its easier to read than this shittaiu
what is the formula for direct proportion
NEED TO LEARN
x=ky^X
^x = any number as a power
where x is DIRECTLY proprtional to y
what is the formula for inverse proprtion
NEED TO LEARN
x =k / y^x
^x = any power eg y squared
what is the formula for the area of a triangle IF THERES NO HEIGHT
1/2 x abxSin C
C = angle ab= two sides multiplied together
what is the formula for the area of a sector NEED TO KNOW EASY MARKS
π x r^2 x angle / 360
angle is also sometimes known as THETA and has a weir symbol θ
what is the formula for the equation of a straight line
y = mx+c
m = gradient c = y intercept
what is the formula of the gradient of a line
m = change in y coordinates / change in x coordinates
m = gradient
what is the formula for frequnecy density in histograms EASY MARKS
frequency / class width
class width is foun by the range NOT THE MIDPOINTS eg 10>x<20 = 10
