The satang coin from Thailand has a radius of about 7 mm

The diameter is mm.

The circumference in terms of me is

x mm,

for

the approximate value of the circumference is

mm

Given:

The satang coin from Thailand has a radius of about 7 mm.

We need to determine the diameter and circumference of the coin.

Diameter of the coin:

The diameter of the coin can be determined by multiply the radius by 2.

Thus, we have;

Substituting r = 7, we get;

Thus, the diameter of the coin is 14 mm.

Circumference of the coin:

The circumference of the coin can be determined using the formula,

Substituting and , we get;

Thus, the approximate value of the circumference of the coin is 43.96 mm

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