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# Einstein Was Born On Pi Day

## Interesting Facts in Easy English

Pre-Listening Vocabulary

• pi (∏): the circumference of a circle divided by its diameter
• ratio: the relationship between two amounts
• circumference: the distance around an edge of a circular shape
• diameter: the line across the centre of a circle
• coincidentally: by chance
• theory of relativity: Einstein’s idea that the way that anything (besides light) moves is dependent on the relative movement of the observer

Einstein Was Born On Pi Day

Pi Day is celebrated on March 14 (3.14), the closest  date to the mathematical number “pi”. Pi, named after a Greek letter (∏), is the ratio of a circle’s circumference divided by its diameter. While the exact value of pi is impossible because it goes on indefinitely without making a pattern, it is typically written as 3.14. Some math and science enthusiasts celebrate Pi Day with contests, while others enjoy pizza (pie) parties! Pi Day originated at a museum in San Francisco in 1988. Coincidentally, March 14 is also Albert birthday. Einstein was a mathematician and physicist who became famous for his theory of .

Comprehension Questions

1. Which geometric shape is commonly associated with pi?
2. Why was March 14 chosen as Pi Day?
3. What physics theory is Einstein well-known for?

Discussion Questions: Do you enjoy studying mathematics? If yes, what do you enjoy about it? If no, why not? How important is it to learn mathematics vocabulary in a second language?