Maths formulae Flashcards
1
Q
Area of a rectangle
A
l x w
2
Q
Area of a parallelogram
A
b x h
3
Q
Area of a triangle
A
1/2 (b x h)
4
Q
Area of a trapezium
A
1/2 (a + b) x h
5
Q
Volume of a cuboid
A
l x h x w
6
Q
Volume of a prism
A
area of cross section x l
7
Q
Volume of a cylinder
A
πr^2 x h
8
Q
Volume of a pyramid
A
1/3 x area of base x h
9
Q
Circumference of a circle
A
C = πd or 2πr
10
Q
Area of a circle
A
A = πr^2
11
Q
Speed
A
distance / time
12
Q
Pressure
A
force / area
13
Q
Density
A
mass / volume
14
Q
Pythagoras’ theorem
A
a^2 + b^2 = c^2
15
Q
Trigonometric ratios
A
SOHCAHTOA
16
Q
Quadratic formula
A
(-b±√b^2 - 4ac) / 2a
17
Q
Sine rule
A
a/sinA = b/sinB = c/sinC
18
Q
Cosine rule
A
a^2 = b^2 + c^2 - 2bc cosA
19
Q
Area of a triangle (trig)
A
1/2 x ab x sinC
