Question

The circumference of a circle is 6.5 cm. What is its diameter?

Answer 1

`"2.07 cm"`

Explanation:

If `"d"` is the diameter of a circle then its circumference is given by

`"C = πd"`

From above

`"d"= "C"/π`

`color(white)("d") = "6.5 cm"/3.14`

`color(white)("d") = 2.07\ "cm"`

Answer 2

`~~2.07" cm to 2 dec. places"`

Explanation:

`"the circumference (C) of a circle is calculated using"`

`•color(white)(x)C=pidlarrcolor(blue)" d is the diameter"`

`"here "C=6.5`

`pid=6.5`

`"divide both sides by "pi`

`d=6.5/pi~~2.07`