Lesson to Teach the Basics of Pi

Presentation

•

Mathematics

•

7th - 8th Grade

•

Hard

Joseph Anderson

FREE Resource

8 Slides • 13 Questions

Pi Day - March 14

It's all just a ratio.. 3.14159

Multiple Choice

Pi Day is celebrated on March 14. (which was chosen because it resembles 3.14) What time does the official celebration begin?

3:14 PM

7:22 PM

1:59 PM

5:18 PM

Multiple Choice

The symbol for pi was introduced in the last _____ years.

100

200

300

400

Multiple Choice

What U.S. city has a zip code containing the first 5 digits of pi?

Savannah, Georgia

Salt Lake City, Utah

Frankfort, Kentucky

Juneau, Alaska

Multiple Choice

What famous scientist was born on Pi Day in 1879?

Archimedes

Einstein

Galileo

Newton

What is this thing we call π $\approx$ 3.14159?

π is the ratio of the Circumference to the diameter
π ≈ 3.14 or $\frac{22}{7}$
Use the site below to try this at home
https://www.exploratorium.edu/snacks/cutting-pi

Multiple Choice

The circumference of a circle is C centimeters. The diameter of the circle is 13 centimeters. Which expression best represents the value of π?

$\frac{C}{6.5}$

$\frac{6.5}{C}$

$\frac{C}{13}$

$\frac{13}{C}$

Multiple Choice

The circumference of a circle is 25 centimeters. The diameter of the circle is d centimeters. Which expression best represents the value of π?

$\frac{12.5}{d}$

$\frac{d}{12.5}$

$\frac{d}{25}$

$\frac{25}{d}$

The Diameter Formula

$C\ =\ \pi d$

Multiple Choice

What is the circumference of a circle with a diameter of 5 feet?

15.7 ft

31,4 ft

78,5 ft

Multiple Choice

What is the circumference?

108π

18π

1088π

36π

Multiple Choice

What is the circumference of this circle?

3.14 cm

37.7 cm

24 cm

68.4 cm

The Radius formula

$C\ =\ 2\pi r$

Open Ended

What do you notices about the 2 formulas used to find Circumference, $C\ =\ \pi d$ and $C\ =\ 2\pi r$ ?

Type response here

Multiple Choice

What is the circumference of a circle with a radius of 3 meters?

9.42 m

18.84 m

28.26 m

Multiple Choice

The radius of the circle is 9 meters. What is the circle's circumference?

9 meters

28.26 meters

56.52 meters

18 meters

Multiple Choice

Find the circumference (to the nearest whole number)

88 in

44 in

116 square in

Explore more at these websites

https://www.exploratorium.edu/pi
http://www.subidiom.com/pi/pi.asp
https://solarsystem.nasa.gov/news/350/10-ways-to-celebrate-pi-day-with-nasa-on-march-14/

Pi Day - March 14

It's all just a ratio.. 3.14159

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