Understanding Pi and Its Approximation

The video tutorial explains Pi as the ratio of a circle's circumference to its diameter, highlighting that Pi is an irrational number and cannot be expressed as a fraction of two whole numbers. However, the fraction 22/7 is often used as an approximation. The tutorial demonstrates this by unfolding a circle into a line and showing how the circumference is approximately 3 times the diameter plus a small fraction. This fraction is further explained as 1/7 of the diameter, leading to the approximation of Pi as 22/7.

What is pi primarily known as?

• A fraction of two whole numbers

• The diameter of a circle

• The ratio of a circle's circumference to its diameter

• A whole number

Which fraction is commonly used to approximate pi?

• 5/6

• 7/8

• 3/4

• 22/7

When a circle is unfolded into a line, what does the line represent?

• The circumference of the circle

• The radius of the circle

• The diameter of the circle

• The area of the circle

How many times is the diameter approximately contained in the circumference?

• 2 times

• 3 times

• 5 times

• 4 times

What is the small fraction added to 3 times the diameter to approximate the circumference?

• 1/5 of the diameter

• 1/8 of the diameter

• 1/7 of the diameter

• 1/6 of the diameter