Question

For any circle, which ratio is equal to the number π? Select all that apply.

A.
circumference
diameter
B.
circumference
radius
C.
circumference
2 times radius
D.
radius
diameter
circumference
E.

F.area squared

Answer 1

circumference - diameter

circumference - 2 times radius

area - radius squared

Explanation:

we know that

The circumference of a circle is equal to

`C=\pi D` or
`C=2\pi r`

where

D is the diameter and r is the radius

therefore

`\pi =(C)/(D)` or
`\pi =(C)/(2r)`

The number pi is the ratio circumference - diameter or is the ratio circumference - 2 times radius

The area of the circle is equal to

`A=\pi r^(2)`

therefore

`\pi =(A)/(r^(2) )`

The number pi is the ratio Area - radius squared