Area 1
Area of a square.
A = x2
Area of a kite
A = 1/2 xy
TSA of a cube
SA = 6x2
Area of a rectangle
A = l * w
Area of a trapezium
A = 1/2(a+b) h
TSA of a rectangular prism
SA = 2(lw + lh + wh)
Area of a circle
A = pi * r2
TSA of a sphere
SA = 4 * pi * r2
Area of a triangle
A = 1/2 b h
TSA of a closed cylinder
SA = 2 pi r2 + 2 pi r h
Area of ellipse
A = pi * a * b