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What is the name of a line drawn from one side of a circle to the other through the center?
This is called the diameter of the line that passes through the center of the circle. Half of that line is called the radius.
A line segment that is only half through the circle?
If you mean a line that gous from the center of a circle to the edge of the circle, that is a radius.
Is a line across a cirCle called a diameter?
yes half of that line is called the radius (used to calculate the area of a circle)
What is the straight line through the center of a circle called?
A line that goes through a circle is a secant line. (Remember that a line is infinitely long.) Anyline that passes through a circle is a secant line, whether it passes through the center of the circle or not. Compare this to a line segment with endpoints on the circumference of a circle. That segment is called a cord of that circle. If the cord of a circle passes through the center of that circle, it is a diameter of that circle, which is the longest cord of the circle.
What is radius?
Radius is half the diameter. The diameter of a circle is a straight line that passes from one side of the circle to the other through the centre of the circle. Half of that line is the radius.
