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Ramanujan’s Pi Formula

Visual definition of Pi (3.14), diameter, radius, and other circle vocab, as well as visual aides in learning math formulas for circles.

from Teachers Pay Teachers

Pi - A Linear Equation Graphing Activity

Celebrate Pi Day with this linear equation graphing activity. Students are given a list of linear equations each with a corresponding domain or range. The equations will occur in either standard form or slope-intercept form. When the students graph all of the equations, they will have a picture of the symbol "Pi."


Quadratic Expression, Quadratic Equation, Quadratic Formula - Math Classroom Poster by PosterEnvy,

from HubPages

What is Pi. Includes formulas, equations, examples.

All about pi and Pi Day. Includes pi formulas and equations.


Pi Formula Has Been Discovered Hidden Deep Inside Hydrogen Atoms

from ABC News

Why You'll Want to Circle This Year's Pi Day on Your Calendar

Pi Day: Circle Your Calendar -- Once-in-a-Century Day Coming This Weekend - ABC News

from Teachers Pay Teachers

Pi Day Pennant

In this collaborative activity celebrating Pi Day, students work with the circle formulas to find area, circumference, radius and diameter. Each pennant also includes a Fun Fact that students can read as they complete their circle problems. Once a pennant is complete, it can be hung along a string in your classroom to celebrate Pi Day!

from Teachers Pay Teachers

Pi Day Song: Pi With a Little Help From My Friends

This is a fun song to sing on Pi Day and will liven up any Pi Day Celbration. It is to the tune of the "With a Little Help From My Friends" Made famous by the Beatles-- It can also be used when studying volume and surface area formulas for cylinders and spheres.

Euler's identity seems baffling: $$e^{i\pi} = -1$$ It emerges from a more general formula: $$ e^{ix} = \cos(x) + i \sin(x)$$ Yowza -- we're relating an _imaginary exponent_ to sine and cosine! And somehow plugging in pi gives -1? Could this ever be intuitive? Not according to 1800s mathematician Benjamin Peirce: > It is absolutely paradoxical; we cannot understand it, and