Circumference of a square = side length ×4
Area of rectangle = length × width
Area of a square = side length × side length
Area of triangle = base × height ÷2
Area of parallelogram = base × height
Trapezoidal area = (upper bottom+lower bottom) × height ÷2
Diameter = Radius ×2 Radius = Diameter ÷2
Circumference = π× diameter = π× radius× 2
Area of circle = π× radius× radius
Surface area of cuboid = length × width+length × height+width × height) ×2
Cuboid volume = length × width × height
Surface area of cube = side length × side length ×6
Volume of cube = side length × side length × side length
Lateral area of cylinder = perimeter of bottom circle × height.
Surface area of cylinder = upper and lower bottom area+side area.
Volume of cylinder = bottom area × height
Volume of cone = bottom area × height ÷3
Cuboid (cube, cylinder)
Volume = bottom area × height
plane graph
Name symbol perimeter c and area s
The length of side a of a square is c = 4a.
S=a2
The length of a side and b side of a rectangle is c = 2 (a+b).
S=ab
The length of three sides of triangle A, B and c-
Height of h-a edge
Half the circumference
A, b, c- internal angle
Where s = (a+b+c)/2s = ah/2 = ab/2sincc.
=[s(s-a)(s-b)(s-c)] 1/2
=a2sinBsinC/(2sinA)
Quadrilateral d, d- diagonal length
α diagonal angle s = DD/2 sin α
Length of a and b sides of parallelogram
Height of h-a side
α-included angle between two sides s = ah
=absinα
A-side length of diamond
α-included angle
D- long diagonal length
D- short diagonal length s = DD/2
=a2sinα
Trapezoids a and b- length of upper and lower bottoms
up level
M- centerline length s = (a+b) h/2
=mh
radius of a circle
D- diameter c = π d = 2π r
S=πr2
=πd2/4
Sector r- sector radius
Degree of central angle
C=2r+2πr×(a/360)
S=πr2×(a/360)