Question

π is the ratio of circumference of a circle to its __________.

• A. radius
• B. area
• C. radius²
• D. diameter

Answer 1

The correct option is D diameter

The circumference of a circle = 2 $\times \frac{22}{7}\times r$ (Where, r is radius of the circle)
$=2\pi$r
Diameter of the circle (d) = 2r

The circumference of a circle $=2\times \pi \times r$ $=\pi \times d$
$\pi =\frac{Thecircumferenceofacircle}{Diameterofthecircle}$
Hence, the ratio of circumference of a circle to its diameter is π.