Form 9 Listening 2020

Pi Day is celebrated on March 14 (3.14), the closest _____ date to the mathematical number "pi".

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 parties!

A Math Museum in San Francisco which _____ Pi Day in 1988 _____ March 14 is also Albert Einstein's birthday.

Einstein was a mathematician and physicist who became famous for his theory of _____.

In 2005, Biz Stone and his co-worker Evan Williams worked at Google.

A lot of sponsors were interested in their business.

Biz Stone and Evan Williams left Google before two weeks they organized their group.

Jack Dorsey was a co-worker with an idea of a microblogging service.

The new microblogging service became a prototype of Twitter.