Index, middle and ring fingers held together subtend an angle of 5 degrees.
From the smh.com.au
Indeed, even the largest Cepheids in the sky subtend an angle of only 0.003 arc second.
From the sciencedaily.com
In the diagram sides AB,BC,CD and DA are labelled and and subtend angles and respectively.
From the en.wikipedia.org
Similarly the diagonals are equal to the sine of the sum of whichever pair of angles they subtend.
From the en.wikipedia.org
In the ideal eye, the image of a diffraction grating, can subtend 0.5 micrometre on the retina.
From the en.wikipedia.org
In the case of a circle of unit diameter the sides of any cyclic quadrilateral ABCD are numerically equal to the sines of the angles and which they subtend.
From the en.wikipedia.org
More examples
Be opposite to; of angles and sides, in geometry
In geometry, an angle subtended by an arc is one whose two rays pass through the endpoints of the arc. The precise meaning varies with the context. For example, one may speak of the angle subtended by an arc of a circumference when the angle's vertex is a point on the circumference. ...
To extend or stretch underneath or opposite something; To enclose an arc on a circle with an angle
(subtended) lying under or opposite to.
(subtended) positioned just below the axil.
Occurring immediately below, as sepals subtending petals or leaves subtending axillary buds.
Situated directly beneath an organ, as bracts beneath an inflorescence.
To occupy a position below and adjacent to.
To stand below or close under, as a bract subtending a flower.