How do you find the area of a circle with diameter of 16?

Jul 31, 2015

approxcolor(blue)(201 cm^2

Explanation:

The area of a circle is given by formula:
color(blue)(pir^2

$\pi$ has a constant value of $3.14$

And the radius of the circle is , half the diameter = $\frac{d}{2} = \frac{16}{2} = 8 c m$ (assuming the unit to be in cm)

The area $= \pi {r}^{2} = 3.14 \times {\left(8\right)}^{2} c {m}^{2}$

$= 3.14 \times \left(64\right)$

$= 200.96 c {m}^{2}$

approxcolor(blue)(201 cm^2