Answer :

In geometry, the radius of a cylinder can be found by dividing the diameter by 2. Given a diameter of 18 cm, the radius of the cylinder is 9 cm.

The subject in discussion here is Mathematics, focusing on geometry. In geometry, a cylinder has two equal circles and a curved surface connecting these circles. The circles are called the bases of the cylinder, and the straight line segment connecting the centers of the two bases is the axis of the cylinder. The diameter of the cylinder is the length of any straight line that passes through the center of the base and ends at points on the circle. To find the radius of the cylinder, you simply need to divide the diameter by 2.

Given that the diameter of the cylinder is 18 cm, we can find the radius by dividing 18 by 2. This gives a radius of 9 cm.

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