Question

4.4 circumference and area of a circle
label the parts of the circle
radius
diameter
circumference

Explanation:

Step1: Identify the radius

The radius is the line - segment from the center of the circle to a point on the circle. It is the red line in the diagram.

Step2: Identify the diameter

The diameter is a line - segment that passes through the center of the circle and has its endpoints on the circle. It is the blue line in the diagram.

Step3: Identify the circumference

The circumference is the distance around the circle. It is the outer boundary of the circle, indicated by the red - arrowed curve.

Answer:

Top - left box: Radius
Bottom - left box: Diameter
Right box: Circumference