Area and Perimeter Formulas
|Equilateral Triangle||Isosceles Triangle||Scalene Triangle|
P = 2 · (a + b)
A = b · h
Area of Trapezoid
Area of a Regular Polygon
n is the number of sides
The area is obtained by triangulating the polygon and adding the area of these triangles.
A = T1 + T2 + T3 + T4
The circular area of the segment AB = Area of the circular sector AOB - Area of triangle AOB
Lune of Hippocrates
Area of the lune = area of the semicircle − area of circular segment.
Area Enclosed between Two Concentric Circles
Surface Area and Volume Formulas