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Look up subtend in Wiktionary, the free dictionary. In geometry, an angle is subtended by an arc, line segment or any other section of a curve when its...

could be said to have "half" the normal acuity of 6/6. At exactly 6 metres' distance from the patient, the letters on the 6/6 line shall subtend 5 minutes...

subtend the same solid angle as a larger object farther away. For example, although the Moon is much smaller than the Sun, it is also much closer to Earth...

radian. The steradian is a dimensionless unit, the quotient of the area subtended and the square of its distance from the centre. Both the numerator and...

reduced by the cosine of the emission angle, the solid angle, subtended by surface visible to the viewer, is reduced by the very same amount. Because the...

parallax and trigonometry, and is defined as the distance at which 1 AU subtends an angle of one arcsecond (1/3600 of a degree). The nearest star, Proxima...

two chords intersect on the circle. It can also be defined as the angle subtended at a point on the circle by two given points on the circle. Equivalently...

"English"), then after collision, the diverging paths of the two balls will subtend a right angle. (a) In the stationary frame, an incident sphere traveling...

approximate angle subtended by a U.S. dime coin (18 mm) at a distance of 4 kilometres (about 2.5 mi). An arcsecond is also the angle subtended by an object...

that with the older tradition of 28 Nakshatras each equal segment would subtend 12.85 degrees or 12° 51′. But the 28 Nakshatra were chosen at a time when...

supporting stalk or stem is highly reduced or absent). The stem or stalk subtending a flower, or an inflorescence of flowers, is called a peduncle. If a peduncle...

intersecting the circle in two distinct points A and B. Central angles are subtended by an arc between those two points, and the arc length is the central...

of Euphorbia species in subgenus Lacanthis are the cyathophylls. Bracts subtend the cone scales in the seed cones of many conifers, and in some cases,...

{CD}}=\cos \beta } . By the inscribed angle theorem, the central angle subtended by the chord A C ¯ {\displaystyle {\overline {AC}}} at the circle's center...

angle subtended by the star at his viewing point. In his Dialogue, he reported that he had found the apparent diameter of a star of first magnitude to be...

plants have bracts that subtend the inflorescence, where the flowers are on branched stalks; the bracts are not connected to the stalks holding the flowers...

defined such that one radian is the angle subtended at the centre of a circle by an arc that is equal in length to the radius. The unit was formerly an SI...

{\displaystyle {\frac {a+b}{a}}={\frac {a}{b}}} The golden angle is then the angle subtended by the smaller arc of length b. It measures approximately 137.5077640500378546463487...

retinal resolution. In the ideal eye, the image of a diffraction grating can subtend 0.5 micrometre on the retina. This is certainly not the case, however,...

parallax and trigonometry, and is defined as the distance at which 1 AU subtends an angle of one arcsecond (1/3600 of a degree). The nearest star, Proxima...