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.