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

Jun 5, 2018

$\text{2.07 cm}$

#### Explanation:

If $\text{d}$ is the diameter of a circle then its circumference is given by

$\text{C = πd}$

From above

"d"= "C"/π

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

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

Jun 5, 2018

$\approx 2.07 \text{ cm to 2 dec. places}$

#### Explanation:

$\text{the circumference (C) of a circle is calculated using}$

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

$\text{here } C = 6.5$

$\pi d = 6.5$

$\text{divide both sides by } \pi$

$d = \frac{6.5}{\pi} \approx 2.07$