Formulas Flashcards
Area of a rectangle or square
A = L x B
Area of a right angled triangle
A = 1/2 x B x H
(B x H / 2)
Area of a rhombus
A = 1/2 (D x D)
Area of a kite
A = 1/2 x diagonal x diagonal
Area of a parallelogram
A = B x H
Area of a trapezium
A = 1/2 x B x H
Volume of a cylinder
V = pi r^2 x H
(Area of circle x height)
Volume of a cuboid
V = (L x B) x H
(Area of top) x height
Volume of a pyramid
V = (1/2 x B x H) x H
(Area of triangle) x height
Volume of a hexagonal prism
V = Area of top x H
(Split into 6 triangles (or however many sides e.g. pentagonal = 5 triangles))
Volume of a cone
V = 1/3 x pi r^2 x H
Volume of a sphere
V = 4/3 x pi r^3
Sin rule formula
a = b = c
SinA = SinB = SinC
Cosine rule formula To FIND A SIDE
a^2 = b^2 + c^2 - 2bc cosA
Cosine rule formula To FIND AN ANGLE
CosA = b^2 + c^2 -a^2
2bc
How do we measure gradient?
Up or Down distance
Across distance
Gradient formula
m = y2 - y1
x2 - x1
Equation of a straight line
y = mx + C
Volume of a prism
V = (Area of cross section) x H
Volume of a polygon
V = (Area of e.g. hexagon) x H
Split hexagon into triangles
Area🔺= 1/2 ab sin(360 / no of triangles)
Interquartile range formula
Interquartile range = Q3 - Q1
Semi interquartile range formula
Semi interquartile range = Q3 - Q1
2
Standard Deviation formula
Std Dev = √ ∑ ( x - x̄)^2
(n-1)
(SQUARE ROOT WHOLE FORMULA)
Arc formula
Arc = angle at centre x pi x D
360
Sector formula
Sector = angle at centre x pi r^2
360
Difference of squares formula
a^2 - b^2 = (a-b) (a+b)
Trinomials formula
ax^2 + bx + c
