Geometry Formulas All Gathered On One Easy Cheat Sheet

 

GEOMETRY FORMUL

SH

PES   —  perimeter

S

(P) and area (A)

SQUARE

TRIANGLE

CIRCLE

P = 4a

P = a+b+c

C = 2πr  

1

2

 A = a

2

 A = 2 b  bh h

c

h a

a

 A = π r

r

 b RECTANGLE

PARALLELOGRAM

TRAPEZOID

P = 2a+2b  A = a b

P = 2a+2b  A = b h

P = a+b+c+d

a

 A =

+ 2

d

h a

h a

c  b

 b

 b SOLIDS   —  surface

h

area (SA) and volume (V)

CUBE

RECTANGULAR PRISM

CYLINDER

SA = 6a 2    V = a 3  

SA = 2ab+2ac+2bc  V = a b c

SA = 2πr(r+h)    V = πr2h

a

r

h

a c  b

SPHERE

CONE

SA = 4πr 2  

 V = πr2h

 V =

4πr3

RECTANGULAR PYRAMID

1

1

V = abh

3

 

3

3

r r

h

h a  b

Created by Jason Murphy in 2014. CC BY-NC-SA.