Any line parallel to the axis is a diameter, and the parameter of any diameter is measured by the focal chord drawn FIG.
Properties of the limagon may be deduced from its mechanical construction; thus the length of a focal chord is constant and the normals at the extremities of a focal chord intersect on a fixed circle.
A simple refrain of a childish song or the monotonous chaunt of the ploughman touched a hidden chord and thrilled her to tears.
I used to have time to think, to reflect, my mind and I. We would sit together of an evening and listen to the inner melodies of the spirit, which one hears only in leisure moments when the words of some loved poet touch a deep, sweet chord in the soul that until then had been silent.
Plinlimmon (2468 ft.) is the highest of the hills, and forms a sort of hydrographic centre for the group, as from its eastern base the Severn and the Wye take their rise - the former describing a wide curve to east and south, the latter forming a chord to the arc in its southward course.
It struck a chord deep within her, as if she should know it.
The length of the arc of a circle, for instance, is known if the length of the chord and its distance from the middle point of the arc are known; but it may be more convenient in such a case to use a formula such as Huygens's rule than to obtain a more accurate result by means of trigonometrical tables.
To trisect an angle by means of this curve, describe a circle with centre 0 and radius OE, and let the given angle which is to be trisected be laid off from OE and cut the circle at S; let the chord ES cut the trisectrix in J.
Of the island, on a small bay looking E., the coast forming the chord of a semicircle of mountains which hem in the campagna of Palermo, called the Conca d'Oro.
Projecting from the upper platform at the centre of the chord of the semicircular area is a cube of rock, ii ft.