from an acute angle
81geometry — /jee om i tree/, n. 1. the branch of mathematics that deals with the deduction of the properties, measurement, and relationships of points, lines, angles, and figures in space from their defining conditions by means of certain assumed properties… …
82Skew arch — A skew arch (also known as an oblique arch) is a method of construction that enables an arch bridge to span an obstacle at some angle other than a right angle. This results in the faces of the arch not being perpendicular to its abutments and its …
83Glaucoma — An eye condition in which the fluid pressure inside the eyes rises because of slowed fluid drainage from the eye. Untreated, it may damage the optic nerve and other parts of the eye, causing vision loss or even blindness. Two million Americans… …
84Otoplasty — Otoplasty: the pre operative front aspect (left), and the post operative front aspect (right) of an infantile otopexy (ear pinback) correction to a girl. Otoplasty (Greek ōtoûs, ear + plassein, to shape) denotes the surgical and non surgical… …
85Non-Euclidean geometry — Behavior of lines with a common perpendicular in each of the three types of geometry Non Euclidean geometry is the term used to refer to two specific geometries which are, loosely speaking, obtained by negating the Euclidean parallel postulate,… …
86History of trigonometry — The history of trigonometry and of trigonometric functions may span about 4000 years.EtymologyOur modern word sine is derived from the Latin word sinus , which means bay or fold , from a mistranslation (via Arabic) of the Sanskrit word jiva ,… …
87Golden ratio — For the Ace of Base album, see The Golden Ratio (album). Not to be confused with Golden number. The golden section is a line segment divided according to the golden ratio: The total length a + b is to the length of the longer segment a as the… …
88Tracheal intubation — Intervention Anesthesiologist using the Glidescope video laryngoscope to intubate the trachea of a morbidly obese elderly person with challenging airway anatomy …
89Birefringence — Displacement of light rays with perpendicular polarization through a birefringent material …
90Chisel — This article is about the tool. For the American band, see Chisel (band). For the album by Australian band Cold Chisel, see Chisel (album). Steel woodworking chisel …
