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Miriama states that the circumference of a circle with a diameter of 12 cm is 6π cm. Is she correct? Explain.

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To determine if Miriama is correct or not, you calculate the circumference of a circle.

Use the following formula for the circumerence C:

C = 2πr

where r is the radius of the crcumference. The radius is one half the diamater of a circle, and you have the diameter = 12cm. Then, the radius of the circle is

r = 12cm/2 = 6cm

Next, replace the value fo r into the formula for C:

C = 2π(6cm) ) 12π cm

Hence, Miriama is wrong and the circumference of the circle is 12π cm and not 6π cm.

User Yene Mulatu
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