Question

Each circumference is given using the ≈ symbol. What does that mean about

the circumferences? What is the approximate circumference of a circle with
diameter 1 cm?

Answer 1

Circumference ≈ 3.142 cm

Explanation:

≈ basically means that it's an approximate value.

The formula to find the circumference of a circle is:

Circumference = 2πr

The diameter is given, but we can find the radius by halving the diameter.

radius =
`(d)/(2)` =
`(1)/(2)` = 0.5 cm

Now that we know the radius, we can add the radius into the formula and find the circumference.

Circumference = 2 × π × 0.5

Circumference = π × 1

Circumference ≈ 3.142 cm