The radius of a circle is one half of the circle's diameter, any line going from the center of the circle to the circle itself. A line connecting other points on a circle (or on any curve) is called a chord.
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A line that goes only from the outside of the circle to its center is known as the radius.
It is called the diameter. The line that goes halfway through the circle is the radius.The length of a straight line through the center of a circle is called the diameter. Any other object I'm not sure has a name; perhaps the length...width...or height
A line joining two points on a circle is called a chord. A chord is a straight line segment whose endpoints lie on the circle. The longest chord in a circle is called the diameter, which passes through the center of the circle. Chords play a significant role in geometry and trigonometry when studying circles and their properties.
The diameter is the chord (line that goes from the circle to the circle) that goes through the center of the circle. It is the largest chord. It is also equal to twice the radius.
it goes up and down not across
No. they are in fact very different. A circle's diameter is the length of the longest line that goes all the way across it. A three-dimensional shape has a volume, which is the amount three-dimensional space enclosed by it.