DIAGRAMS &

EQUATIONS

Equation1.png

CIRCUMFERENCE OF A CIRCLE

C = 2πr = πd

c = Circumference

r = Radius

d = Diameter

π = 3.14159

CIRCUMFERENCE OF AN ELLIPSE

R = larger radius

r = smaller radius

C = (R + r)π

Equation2.png
Equation3.png

CIRCUMFERENCE OF AN ARCH

CL = Chord Length

CH = Chord Height

L = Arch Length

OR = Outside Radius

IR = Inside Radius