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Intervals of Significance

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: s2;
for a rectangle: lw;
for a triangle: bh;
for a circle:
πr2;
for a sphere, a rhombus, a parallelogram;
and for a prism or a pyramid,
areas lateral and surface.

I can describe my life as
δn,
and in this math
there is a
Δ at the end,
or a null set.
Both answers are correct.

Elaine Mintzer

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

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