Question

Formula to calculate circumfrence,radius and diameter of a circle.

Answer 1

`\begin{gathered} C=2\pi r \\ r=(d)/(2) \\ d=2r \end{gathered}`

Explanations:

The circumference is simply defined as the perimeter of a circle

Based on the given question, we are to find the formula for calculating the circumference of a circle, radius, and diameter

For circle:

The formula for calculating the circumference is expressed as:

`C=2\pi r\text{ or }\pi d`

where:

r is the radius of the circle

d is the diameter of the circle

For radius

The radius is the distance from the center of a circle to any point on the circumference. The radius can be expressed as a function of the diameter as shown:

`r=(d)/(2)`

d is the diameter of the circle

For the diameter of a circle

The diameter of the circle is the line that divides a circle into two equal parts. This can also be written as a function of the radius.

`d=2r`