Question

The ratio of the circumference of any circle to its diameter is called ____ and is approximately equal to ______.

• A. $\pi$, $\frac{22}{7}$
• B. $\pi$, 3.14
• C. $\pi$, $\frac{7}{22}$
• D. Pi, $\frac{22}{7}$

Answer 1

Answer: (A), (B), (D)

The correct options are
A $\pi$, $\frac{22}{7}$
B $\pi$, 3.14
D Pi, $\frac{22}{7}$

Circumference of a circle 'C' = 2$\pi$r, where 'r' = radius of the circle.
Hence, 2r = d , diameter of the circle.
$\therefore$ $\pi$$\times d=C$
or $\frac{C}{d}$ = $\pi$ is also referred to as the Greek alphabet ,Pi and has an approximate value = $\frac{22}{7}$ or 3.14