Answer:
1A circle is named by its center. Thus, the circle to the right is called circle A since its center is at point A. Some real world examples of a circle are a wheel, a dinner plate and (the surface of) a coin. The distance across a circle through the center is called the diameter.
2 2 x radius
3 minor arc.
4 Central Angle is the angle formed by two arms with the center of a circle as the vertex. The two arms form two radii of the circle intersecting the arc of the circle at different points. Central angle helps to divide a circle into sectors.Central Angle.
5 40 milimiters
