Answer:
B. 12 cm
Step-by-step explanation:
The diameter is twice the radius.
The picture shows a segment from the center of the circle to a point on the circle. That is a radius of the circle. The radius of the circle has a length of 6 cm.
The diameter is twice the radius.
diameter = 2 * radius
diameter = 2 * 6 cm
diameter = 12 cm
