Which formula is used to find the circumference of a circle when the radius is given?(1 point) Responses C=r2 upper C equals r squared C=2d upper C equals 2 d C=r upper C equals r C=2r

C=2πr Upper C equals 2 pi r

so C=2r

No, C=2r is not the correct formula for finding the circumference of a circle when the radius is given. The correct formula is C=2πr, where C represents the circumference of the circle, and r represents the radius.

so C=r2

No, C=r2 is also not the correct formula for finding the circumference of a circle when the radius is given. The correct formula is C=2πr or C=πd, where C represents the circumference of the circle, r represents the radius, and d represents the diameter.

so C=r?

No, C=r is also not the correct formula for finding the circumference of a circle when the radius is given. The correct formula is C=2πr or C=πd, where C represents the circumference of the circle, r represents the radius, and d represents the diameter.

so C=2d?

No, C=2d is not the correct formula for finding the circumference of a circle when the radius is given. The correct formula is C=2πr or C=πd, where C represents the circumference of the circle, r represents the radius, and d represents the diameter.

then your answer is wrong