Chat with our AI personalities
When you put an invisible line through the middle of an object and both sides match.
A line through a circle that does not go through the center of the circle is a secant line. A line through a circle that does go through the center is still a secant line, by the way. Compare this to a line segment that has its two endpoints on the circumference of the circle. That line segment is a cord of the circle. If that cord of the circle passes through the center of the circle, then the cord is a diameter of that circle.
Circle with a line through it is square yards, a square with a line through it is square feet
It's kind of like an invisible line. For example, say you have a square and you want to know how much triangles it has. You automatically know in your head its two because you drew that same line as a diagonal of the square.
There is no name for it except "A line perpendicular to a line segment and passing through its midpoint".