Pi (π)
A pi was discovered,
In ancient Greek times,
Didn't have apples,
Bananas, or limes...
Unlike desserts,
Those pies people eat,
This pi's a math constant,
But it's still really sweet...
Pi's pretty easy,
It’s 3.14,
It used to confuse me,
But not anymore!
I use it for math,
It's really quite swell,
Although it's irrational,
Pi works pretty well...
Areas of circles?
Try πr^{ 2}
It's the cool constant,
It deserves to be shared...
For circumference you need,
A quick formuli,
Here it is mister,
You gotta' use pi!
(π⋅d)
Yes, pi's the cool constant,
Without it I'd cry,
'Cause I'd fail my math,
If I tried to use pie...
Watch Mr. R.'s Pi Day Music Video! 

Math Challenges 
If a plate has a radius of 8 inches, what is its circumference? 
If a bicycle wheel has a diameter of 30 inches, how far will it roll in one complete revolution? 
If a pizza has an area of 50 square inches, what is its radius? (approximately) 

