Square perimeter = side length ×4 C=4a

Circumference = π× diameter C=πd C =2πr

Circumference of a semicircle = half of the circumference+diameter πr+d

Area formula:

Rectangular area = length× width S=ab

Square area = side length x side length S=a2

Parallelogram area = base × height S=ah

Triangle area = base × height ÷2 S=ah÷2

Trapezoidal area = (upper bottom+lower bottom) × height ÷2 S=(a+b)h÷2.

Area of circle = π× square of radius S=πr2

Side area of cylinder = bottom circumference × height S=Ch.

Surface area formula:

The surface area of a cuboid = (length× width+length× height+width× height )× 2s = (AB+AH+BH )× 2.

Surface area of cube = side length × side length× 6s = 6a2

Side area of cylinder = bottom circumference x height S=C h

Surface area of cylinder = lateral area+bottom area ×2 S=S side +2 S bottom.

Volume formula:

Cuboid volume = length× width× height V=abh

Cube volume = side length x side length x side length V=a3

Cylinder volume = bottom area × height V=Sh

Cylinder volume = half of lateral area × radius V=Ch÷2×r=2πr÷2×r=πr×r).

Cone volume = bottom area × height ÷3 V=Sh÷3 or 1/3Sh.