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The longest measurement inside a circle is its diameter.
The measurement of the outside edge of a circle is known as the circumference.
Because like the perimeter of a rectangle it is the measurement around it and so the circumference of a circle is the measurement around it.
It is the measurement from the middle point of a circle to the edge of the circle
no. its the inside
Diameter is the measurement from one side of the circle, through the center, to the opposite side. Circumference is the measurement around the circle.