Question

The diameter of a circle is 6 inches find the circumference to the nearest tenth

Answer 1

Answer:

18.8 inches

Step-by-step explanation:

The circumference is $\displaystyle{C = 2\pi r}$. The diameter is two times of radius which can be expressed as $\displaystyle{d = 2r}$.

We can rewrite the equation of circumference as $\displaystyle{C = \pi d}$. Thus, substitute d = 6 in:

$\displaystyle{C = 6\pi}\\\\\displaystyle{C = 18.849}$

Rounding to the nearest tenth, we will get:

$\displaystyle{C = 18.8 \ \sf \ inches}$

Hence, the circumference is 18.8 inches.

Answer 2

Circumference = pi x diameter
6 x pi = 18.8 to one decimal place