Which statement is true about the circumference of a circle?

Question

The circumference is equal to the radius of the circle.
The circumference is equal to the diameter of the circle.
The circumference is found by multiplying Pi by the radius.
The circumference is found by multiplying Pi by the diameter.

Answer 1

The true statement about the circumference of a circle is:

The circumference is found by multiplying Pi by the diameter.

This can be expressed with the formula: \( C = \pi d \), where \( C \) is the circumference and \( d \) is the diameter of the circle. Alternatively, the circumference can also be calculated using the radius with the formula: \( C = 2\pi r \), where \( r \) is the radius.