Question

the circumference of a circle is 31.4 cm the diameter of the circle is 10 cm which expression best represents the value of pi​

Answer 1

Answer:

π = 3.14

Explanation:

Circumference of a circle is the length of the circle if it was straightened out to form a line segment. It is the total length of the circle and it is also referred to as the perimeter of the circle. The formula for the circumference of a circle (C) is given by the formula:    

$C=2\pi r$

Where r is the radius of the circle.

Given that C = 31.4 cm and the diameter (d) = 10 cm

$r=\frac{d}{2}=\frac{10}{2}=5cm$

$C=2\pi r\\\pi =\frac{C}{2r}$

Substituting:

$\pi =\frac{C}{2r}=\frac{31.4}{2*5} =3.14\\\pi =3.14$