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    Diameter - Wikipedia

    In geometry, a diameter of a circle is any straight line segment that passes through the centre of the circle and whose endpoints lie on the circle. It can also be defined as the longest chord of the circle. Both definitions are also valid for the diameter of a sphere. In more modern usage, the length See more

    The definitions given above are only valid for circles, spheres and convex shapes. However, they are special cases of a more general definition … See more

    The diameter of a circle is exactly twice its radius. However, this is true only for a circle, and only in the Euclidean metric. Jung's theorem provides more general inequalities relating … See more

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    The symbol or variable for diameter, ⌀, is sometimes used in technical drawings or specifications as a prefix or suffix for a number (e.g. "⌀ 55 … See more

    Angular diameter – How large a sphere or circle appears
    Caliper, micrometer, tools for measuring diameters
    Conjugate diameters – Perpendicular diameters of a circle or hyperbolic-orthogonal diameters … See more

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  2. Diameter Definition & Meaning - Merriam-Webster

  3. Diameter of a Circle - Definition, Examples | Diameter …

    Learn what is the diameter of a circle, how to calculate it using different formulas, and see examples and practice questions. The diameter is a line that passes through the center and meets the circumference at opposite ends, and it

  4. Diameter of a Circle (Definition, Formulas, Properties

    Learn what is the diameter of a circle, how to calculate it using different formulas, and its properties and examples. The diameter is the longest chord of a circle and is double the radius.

  5. DIAMETER | English meaning - Cambridge Dictionary

  6. DIAMETER | definition in the Cambridge English Dictionary

  7. DIAMETER Definition & Meaning | Dictionary.com

  8. Diameter Definition (Illustrated Mathematics Dictionary) - Math is …

  9. Diameter - Math.net

    Learn what a diameter is and how to find it for circles and spheres. Explore the relationships between diameter, radius, circumference, semi-circle, chord and angle.

  10. diameter noun - Definition, pictures, pronunciation and …

    noun. /daɪˈæmɪtə (r)/ /daɪˈæmɪtər/ a straight line going from one side of a circle or any other round object to the other side, passing through the centre. The diameter of the tree trunk was more than a metre. in diameter The dome is 42.3 metres …

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