Geometry Formulas

Area and Perimeter Formulas

Triangle

Equilateral Triangle Isosceles Triangle Scalene Triangle
Perimeter of an Equilateral Triangle Perimeter of an Isosceles Triangle Perimeter of a Scalene Triangle
Equilateral Triangle Isosceles Triangle Scalene Triangle
Area of Triangle

Formula for Area of a Triangle

Square

Square

Perimeter of a Square Formula

Area of a Square Formula

Rectangle

Rectangle

Perimeter of a Rectangle Formula

Area of a Rectangle Formula

Rhombus

Rhombus

Perimeter of a Rhombus Formula

Area of a Rhombus Formula

Rhomboid

Rhomboid

P = 2 · (a + b)

A = b · h

Area of Trapezoid

Trapezoid

Formula for Area of a Trapezoid

Area of a Regular Polygon

Regular Polygon

Perimeter of a Regular Polygon Formula

n is the number of sides

Area of a Regular Polygon Formula

Polygon

Area of an Irregular Polygon

The area is obtained by triangulating the polygon and adding the area of these triangles.

A = T1 + T2 + T3 + T4

Circle

Circle

Circumference of a Circle Formula

Circumference of a Circle Formula

Area of a Circle Formula


Circular Sector

Circular Sector

Length of a Circular Sector Formula

Area of a Circular Sector Formula


Circular Segment

Circular Segment

The circular area of the segment AB = Area of the circular sector AOB - Area of triangle AOB


Lune of Hippocrates

Lune of Hippocrates

Area of the lune = area of the semicircle − area of circular segment.

Lune of Hippocrates Formula

 

Circular Trapezoid

Circular Trapezoid

Area of a Circular Trapezoid Formula


Area Enclosed between Two Concentric Circles

Concentric Circles

Area between Concentric Circles Formula


Surface Area and Volume Formulas

Tetrahedron

Tetrahedron

Area of a Tetrahedron Formula

Volume of a Tetrahedron Formula

Octahedron

Octahedron

Area of an Octahedron Formula

Volume of an Octahedron

Icosahedron

Icosahedron

Area of an Icosahedron Formula

Volume of an Icosahedron Formula

Dodecahedron

Dodecahedron

Area of a Dodecahedron Formula

Volume of a Dodecahedron Formula

Cube


Cube

Diagonal of a Cube Formula

Area of a Face of a Cube

Area of a Cube Formula

Volume of a Cube Formula

Cuboid

Cuboid

Diagonal of a Cuboid Formula

Area of a Cuboid Formula

Volume of a Cuboid Formula

Prism

Prism

Prism of the Base Formula

Area of the Lateral Surface

Area of a Prism Formula

Volume of a Prism Formula

Pyramid



Pyramid

Lateral Area of a Pyramid Formula

Apothem of the Pyramid

Apothem of the Base

Apothem Length

Lateral Area of a Pyramid Formula

Area of a Pyramid Formula

Volume of a Pyramid Formula

Truncated Pyramid



Truncated Pyramid

Perimeter of the Larger Base

Perimeter of the Smaller Base

Apothem of the Truncated Pyramid

Area of the Larger Base

Area of the Smaller Base

Lateral Area of a Truncated Pyramid

Area of a Truncated Pyramid Formula

Volume of a Truncated Pyramid Formula

Cylinder

Cylinder

Lateral Area of a Cylinder Formula

Area of a Cylinder Formula

Volume of a Cylinder Formula

Cone

Cone

Slant Height Formula

Lateral Area of a Cone Formula

Area of a Cone Formula

Volume fo a Cone Formula

Truncated Cone

Truncated Cone

Lateral Area of a Truncated Cone Formula

Area of a Truncated Cone Formula

Volume of a Truncated Cone Formula

Sphere

Sphere

Area of a Sphere Formula

Volume of a Sphere Formula

Spherical Wedge

Spherical Wedge

Area of a Spherical Wedge Formula    Spherical lune

Volume of a Spherical Wedge Formula

Spherical Cap

Spherical Cap

Radius of a Sphere Formula

Area of a Spherical Cap Formula

Volume of a Spherical Cap Formula

Spherical Segment

Spherical Segment

Area of a Spherical Segment Formula    Spherical zone

Volume of a Spherical Segment Formula