# make+obtuse

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**Glossary of botanical terms**— Many of the terms used in Wikipedia glossaries (often most) are already defined and explained within Wikipedia itself. However, lists like the following indicate where new articles need to be written and are also useful for looking up and… …12

**blunt**— I. a. 1. Dull, obtuse, pointless, edgeless. 2. Dull witted, dull, thick witted, obtuse, stupid, stolid. 3. Abrupt, bluff, plain, uncourtly, unceremonious, without formal civility. 4. Brusk (or brusque), rough, harsh, uncourteous, ungracious,… …13

**Angle**— This article is about angles in geometry. For other uses, see Angle (disambiguation). Oblique angle redirects here. For the cinematographic technique, see Dutch angle. ∠, the angle symbol In geometry, an angle is the figure formed by two rays… …14

**History of geometry**— Geometry (Greek γεωμετρία ; geo = earth, metria = measure) arose as the field of knowledge dealing with spatial relationships. Geometry was one of the two fields of pre modern mathematics, the other being the study of numbers. Classic geometry… …15

**Non-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,… …16

**Pentagram**— For other uses, see Pentagram (disambiguation). Regular pentagram A pentagram Type Star polygon Edges and vertices 5 Schläfli symbol {5/2} …17

**Parallel postulate**— In geometry, the parallel postulate, also called Euclid s fifth postulate since it is the fifth postulate in Euclid s Elements , is a distinctive axiom in what is now called Euclidean geometry. It states that: If a line segment intersects two… …18

**Echinodorus**— Taxobox name = Echinodorus image width = 240px image caption = Echinodorus isthmicus name = Echinodorus regnum = Plantae divisio = Magnoliophyta classis = Liliopsida ordo = Alismatales familia = Alismataceae genus = Echinodorus genus authority =… …19

**Omar Khayyám**— Khayyam redirects here. For other uses, see Khayyam (disambiguation). Omar Khayyám عمر خیام A depiction of Omar Khayyám, in the works of Edward FitzGerald Full name Omar Khayyám عمر خیام …20

**dull**— I. adjective Etymology: Middle English dul; akin to Old English dol foolish, Old Irish dall blind Date: 13th century 1. mentally slow ; stupid 2. a. slow in perception or sensibility ; insensible < somewhat dull of h …