Question

five lines on diameter​

Answer 1

Answer:

In more modern usage, the length of a diameter is also called the diameter. In this sense one speaks of the diameter rather than a diameter (which refers to the line segment itself), because all diameters of a circle or sphere have the same length, this being twice the radius r.

Answer 2

Answer:

$\huge\tt\underline{Question}$

Five lines on diameter.

$\huge\tt\underline{answers}$

diameter

➭In geometry, a diameter of a circle is any straight line segment that passes through the center of the circle and whose endpoints lie on the circle.

➭It can also be defined as the longest chord of the circle.

➭For a convex shape in the plane, the diameter is defined to be the largest distance that can be formed between two opposite parallel lines tangent to its boundary, and the width is often defined to be the smallest such distance.

➭A diameter of an ellipse is any chord passing through the center of the ellipse.[2] For example, conjugate diameters have the property that a tangent line to the ellipse at the endpoint of one diameter is parallel to the conjugate diameter.

➭The longest diameter is called the major axis.

$\huge\tt\underline{Formula}$

$d = 2r$

$\huge\tt\underline{more}$

radius formulae:

$r = \frac{c}{2\pi}$

where,

r=radius

c= circumference

π= pi

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