## subtended

Verb

- simple past tense and past participle of
*subtend*

- Each of the twenty triangular faces subtend at the centre the same angle as is
**subtended**by four whole and six half faces of the Platonic icosahedron; in other words, the solid is determined by the twenty planes which can be drawn through the vertices of the three faces contiguous to any face of a Platonic icosahedron. - Cayley gave the formula E + 2D = eV + e'F, where e, E, V, F are the same as before, D is the same as Poinsot's k with the distinction that the area of a stellated face is reckoned as the sum of the triangles having their vertices at the centre of the face and standing on the sides, and e' is the ratio: " the angles
**subtended**at the centre of a face by its sides /2rr." - In Setaria and allied genera the spikelet is
**subtended**by an involucre of bristles or spines which represent sterile branches of the inflorescence. - - Data: radius=a; 0= circular measure of angle
**subtended**at centre by arc; c = chord of arc; c 2 = chord of semi-arc; c 4 = chord of quarter-arc. - Let a be the radius of a circle, and 0 (circular measure) the unknown angle
**subtended**by an arc. Then, if we divide 0 into m equal parts, and L 1 denotes the sum of the corresponding chords, so that L i =2ma sin (0/2m), the true length of the arc is L1 +a9 3 - 5 + ..., where cp. =B/2m.

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- subtenancy
- subtenant
- subtenants
- subtend
- subtended

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