Q. 8

Question

What is the definition of a cylinder? What is the directrix?

What is a ruling?

Step-by-Step Solution

Verified
Answer

A cylinder has two distant parallel circular bases which are connected with a curved surface at a fixed distance from centre.

1Step 1. Definition of a cylinder

One of the fundamental three-dimensional shapes in geometry is the cylinder, which has two distant, parallel circular bases. At a fixed distance from the center, a curved surface connects the two circular bases.

2Step 2. Definition of a directrix

The curve C of a cylinder is termed to be its directrix

3Step 3. Definition of a ruling

Rulings are the lines pf a cylinder that pass through a given plane curve and are parallel to the given line L