In geometry, a diameter of a circle is any straight line segment that passes through the center of the circle and whose endpoints lie on the circle. It can also be defined as the longest chord of the circle. The diameter of a circle is also 2 times it's radius mathematically, 2× radius. In the given figure, the diameter is already given i.e. 24 cm.
A radius is a straight line from the center of a circle to the circumference of a circle. As already mentioned above, the diameter is two times the radius, thus the radius would be half of the diameter (24 cm in this case). so, radius
