We are waiting at Delta Airlines.

My husband says his work project

has reached its delta.

He tells me the capital letter Δ

means an interval of significance

that can be used to calculate area,

and its smaller brother δ

refers to an infinitesimal interval,

sometimes diminishing to its end

sometimes constant,

depending on the function described.

On the brink of this journey,

I wonder how the Δ of my life

will be measured.

When people ask what I do,

my answer is a series of δ s:

I tell them I teach the formula

for the area of a square: s

for a rectangle: lw;

for a triangle: ½ bh;

for a circle: πr

for a sphere, a rhombus, a parallelogram;

and for a prism or a pyramid,

areas lateral and surface.

I can describe my life as δ

and in this math

there is a Δ at the end,

or a null set.

Both answers are correct.

Elaine Mintzer found the secret of Geometry was stating what you see, a skill she had developed writing poems. Her email address is 1emintzer@gmail.com, and her website is www.mintzer.org.