In the circle below, O is the centre.Find its diameter and radius.

The coordinates of the centre of the circle, O, and a point on the circle, N, areshown in the figure below.1What is the radius of the circle?(a) √0.4 units(b) 2 units(c) 4 units(d) √42.4

Question: The circle has a radius of 2 inches. Find the centroid.

is a diameter of a circle with centre  O  and radius  OD  is perpendicular to  AB . If  C  is any point on arc  DB , then the value of  ∠BAD  and  ∠ACD  is

The area of a circle is 38.5 cm2. Find the diameter of circle

The diameter of a circle is 8 centimeters. What is the area of the circle?