The length of the diameter of the circle is 10 cm, which is the length of this circle.

Recall that the circumference can be found by the formula:

C = 2 × ∏ × r,

where ∏ is a constant equal to 3.14;

r is the radius of the circle.

The diameter of the circle is equal to two radii. Means:

C = ∏ × D,

where D is the diameter of the circle.

From the condition of the problem D = 10 cm.Then:

C = 3.14 x 10 = 31.4 cm.

Answer: The circumference is 31.4 cm.



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