Fun facts/History
Irrational.
Calculate the radius of a circle with an area of 10 cm2. Round to 3 decimal places.
1.784 cm
A rope can be shaped into a circle by connecting its ends. What is the length of this rope if the radius is 5 cm? Express in terms of pi.
25pi
In the Book of 1 Kings, the Bible appears to suggest that this number equals 3.
pi
Who performed the first calculation of pi?
Archimedes
If the radius of a circle is increased 100%, the area of the circle is increased...
300%
A pumpkin pie costs $12.55 at Bobby’s Bakery. If the pie has a diameter of 12 inches, what is the cost per square inch of the pie? Round to 2 decimal places.
$0.11/in2
What digit does not appear in the first 20 digits of pi?
0
When was the pi symbol introduced?
1706
What is the surface area of a hemisphere with a base circumference of 6(pi) cm? Express in terms of pi.
27 pi cm2
A pill has a shape of a small capsule. The hemispheres on either sides of the pill has a radius of 0.3 cm, and the length of the entire pill is 1.2 cm. Calculate the surface area of the pill and round to 3 decimal places.
2.262 cm2
What's a famous book containing the word "pi" with a tiger in it?
Life of Pi
Which famous scientist was born on March 14th? (Initials: AB)
Albert Einstein
Refer to the figure given. If R1 + R2 = 6 cm and R2 - R1 = k cm, find the area between these two concentric circles.
6(pi)k cm2
A perfectly spherical watermelon is sliced into 8 equal sectors. Calculate the surface area of one such slice if the diameter is x cm? Express in terms of x.
[(5)(pi)(x2)] / 16
What is "pi" short for?
periphery
What is the record of the approximate number of digits of pi computed to this day?
200 trillion
Two equal/congruent circles in the same plane cannot have this many common tangents:
A) 1
B) 2
C) 3
D) 4
E) none of the above
1
How many digits of pi does NASA use?
16