Question

I NEED HELP I DONT UNDERSTAND​

Answer 1

Answer:

answers are given below

Step-by-step explanation:

1.

Circumference = $2\pi r$

Where 2r = Diameter

Hence

Circumference =  $\pi \times Diameter$

2.

No there is no such circle in which relationship between Radius and Diameter can be represented without  $\pi$.

This is because while deriving the relation the angle measurement ts taken into consideration and the angle are measured in radians i.e. in terms of  $\pi$ not degrees.

3. We can not determine the exact circumference because  $\frac{22}{7}$ is a rational number and but its value is approximately taken from  $\pi$ and  $\pi$ is an irrational number