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That means that a given circle doesn't have two or three diameters. For a given circle, there is a unique measurement, called its "diameter". It is the distance from one end to the other, passing through the center. Since the circle is defined as all the points that are at the same distance from a point (the center), all radii are the same distance; and the diameter is simply twice the radius.
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The center of a circle lies on what?
Every diameter of the circle.
Is every chord of a circle also a diameter?
No. The chord is a diameter only if it passes through the center of the circle. In that case,it's also the longest that any chord can possibly be in that circle.
How many degrees in a circle with a diameter of 5cm?
360. There are 360 degrees in every triangle.
What is half of a diameter of a circle?
The radius is half of the diameter of a circle.
What is the semi major axis of a circle of diameter 24 cm?
Well, when an ellipse has zero eccentricity and is called a circle, its major and minoraxes are both the same length. In fact, every axis through the center has the samelength, even the oblique ones, and every one of them is called a "diameter".So the semi-major axis of a circle is half of the diameter, typically referred to as the "radius".In your circle, that's 12 cm.
