1 Answer

Amit Tandel · Answer 1 · 2022-08-29T13:47:12+0000

The formula for the circumference of a circle is
$\pi d$ .

In a:

The radius is 8 cm.

Therefore the diameter (d) would be 16cm (8 * 2)

Hence, the circumference is
$16\pi$

In b:

The diameter is already given: 13 in.

Thus, the circumference is
$13\pi =40.84$ (2dp)

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