Question

The diameter of the circle above is 6cm what is the circumference of the circle?

Answer 1

• 18.84cm

Explanation:

We know that,

`\bf \leadsto Radius = Diameter / 2`

So,

`\rightarrow \: \sf \: Radius = (6)/(3) \\ \\ \rightarrow \: \sf \: Radius = 3`

`\rule{140pt}{5pt}`

Now,

`\bf \bigstar \: Circumference \: of \: circle = 2πr`

`→ \sf \: 2 × 3.14 × 3 \\ \\ → \sf \: 6 × 3.14`

`\bf \: 18.84cm`

Option a is correct

`\underline{ \rule{190pt}{6pt}}`

Answer 2

C ≈ 18.84 cm

Explanation:

circumference = π · diameter

We can plug the given diameter into this formula, approximating π as 3.14.

C = 3.14 · 6 cm

C ≈ 18.84 cm