Where, and are the lengths of the sides of a triangle, and, and are the opposite angles ( see the figure to the right ), while is the diameter of the triangle's circumcircle.
32.
The orange peel meter uses a laser point light source to illuminate the specimen at a 60?angle and uses a detector to measure the reflected light intensity at the equal but opposite angle.
33.
Where is half the sum of any two opposite angles . ( The choice of which pair of opposite angles is irrelevant : if the other two angles are taken, half their sum is.
34.
Where is half the sum of any two opposite angles . ( The choice of which pair of opposite angles is irrelevant : if the other two angles are taken, half their sum is.
35.
The diameter of the circumcircle, called the "'circumdiameter "'and equal to twice the "'circumradius "', can be computed as the length of any side of the triangle divided by the sine of the opposite angle:
36.
One physical symbol of the shifting perspective is a scene change near the end : when the lights go up again, we are in the same room but looking at it from an almost opposite angle.
37.
If the length of the hypotenuse of a right triangle is 1, then the length of either of the legs is the sine of the opposite angle and is also the cosine of the adjacent acute angle.
38.
These follow from the previous proposition by applying the fact that opposite angles of intersecting lines are equal ( Prop . 15 ) and that adjacent angles on a line are supplementary ( Prop . 13 ).
39.
"This theorem, that when two straight lines cut one another, the vertical and opposite angles are equal, was first discovered, as Eudemus says, by Thales, though the scientific demonstration was improved by the writer of " Elements " ."
40.
Another way contrast is achieved is in the way & ndash; both in the central scene and on the right & ndash; the tax collector's postures are copying almost exactly those of Peter, only seen from the opposite angle.
