1. Nghe và điền từ vào chỗ trống
Einstein was born on Pi Day
Pi Day is ...(1) celebrated on March 14 (3.14), the closest ...(2)... 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 ...(3)... value of pi is impossible to ...(4)... determine because it goes on indefinitely without making a ...(5)... pattern, it is typically written as 3.14. Some math and science enthusiasts celebrate Pi Day with ...(6)... pie-eating contests, while others enjoy ...(7)... pizza (pie) parties! Pi Day originated at a ...(8)... museum in San Francisco in 1988. Coincidentally, March 14 is also Albert Einstein’s birthday. Einstein was a
...(9)... mathematician and physicist who became famous for his theory of
...(10)... relativity.
2. Trả lời câu hỏi
a. A circle is often associated with pi.
b. March 14 was chosen as Pi Day because it is the closest calendar date to this number.
c. Einstein is well-known for his theory of relativity.
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