# 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**

**Comprehension Questions**

- Which geometric shape is commonly associated with pi?
- Why was March 14 chosen as Pi Day?
- 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?

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**Einstein Was Born On Pi Day**

Pi Day is celebrated on March 14 (3.14), the closest **calendar** 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 **to determine** 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 **pie-eating** contests, while others enjoy pizza (pie) parties! Pi Day originated at a museum in San Francisco in 1988. Coincidentally, March 14 is also Albert **Einstein’s** birthday. Einstein was a mathematician and physicist who became famous for his theory of **relativity**.

- A circle is often associated with pi.
- March 14 was chosen as Pi Day because it is the closest calendar date to this number.
- Einstein is well-known for his theory of relativity.