Question

The diameter of a circle is $1$. Calculate the area of the circle.

• A. $\frac{\pi }{8}$
• B. $\frac{\pi }{4}$
• C. $\frac{\pi }{2}$
• D. $\pi$
• E. $2\pi$

Answer 1

Answer: (B)

$\frac{\pi }{4}$

formula to calculate area of a circle is $\pi r^2$.
Given, diameter $d=1$

Radius $r=$ $\frac{d}{2}=\frac{1}{2}$

$\Rightarrow$ Area of circle $=$ $\pi {\left(\frac{1}{2}\right)}^2=\frac{\pi }{4}$ sq. units.