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 =

Pi× 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/2 sinC

=[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)