Formulæ: Formulæ Triangle Equilateral Triangle Triangle Triangle Base Altitude Square Rectangle Rhombus Diagonals
Formulæ: Formulæ Triangle Equilateral Triangle Triangle Triangle Base Altitude Square Rectangle Rhombus Diagonals
Formulæ: Formulæ Triangle Equilateral Triangle Triangle Triangle Base Altitude Square Rectangle Rhombus Diagonals
Shape
Variables
Triangle
Triangle
them.
perpendicular to the base), respectively.
Rectangle
Rhombus
Parallelogram
b and h are the length of the base and the length of the
Trapezoid
Regular hexagon
Regular octagon
Square
and width).
rhombus.
perpendicular height, respectively.
(height) between the parallels.
Circle
Circular sector
Ellipse
respectively.
respectively.
Total surface area of
a Cylinder
Lateral surface area of a
cylinder
The above calculations show how to find the area of many common shapes.
The area of irregular polygons can be calculated using the "Surveyor's formula".[2]