The formula for the circumference of a circle is c=rd, where d is the length of the diameter. if d is a rational number, what can you conclude about the circumference? it is a fraction. it is a repeating or terminating decimal. it is a rational number. it is an irrational number.

The statement that is true about the circumference of the circle is:

The formula for the circumference of a circle is :

         c=πd where d is the  length of the diameter.

and π is a irrational number.

If d is a rational number, then as we know that the multiplication of a rational and a irrational number is always irrational.

Hence, the value of circumference is an irrational number.

The answer is (d) It is an irrational number.

Step-by-step explanation:  Given formula for circumference of a circle is

where 'd' is the length of the diameter and a rational number.

We are to choose one of the given four options for the circumference 'c' of the circle.

We know that the circumference of a circle with diameter 'd' is given by

Comparing this with the given equation, we get

Now, the product of a rational and an irrational number is again irrational, so 'r × d' will be an irrational number.

Hence, the circumference, c = rd is irrational.

Thus, the correct option is (d) It is an irrational number.

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step-by-step explanation: