Make sure the unit for circumference and diameter are the same. For example cm for diameter and cm for circumference.

For the Area, DO NOT CALCULATE the area. Leave it blank.

Only fill in the area if you measured it directly by, for example, tracing out the circle on graph paper and counting boxes.

For the Area, DO NOT CALCULATE the area. Leave it blank.

Only fill in the area if you measured it directly by, for example, tracing out the circle on graph paper and counting boxes.