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An angle equal to 1 / 4 turn (90° or π / 2 radians) is called a right angle. Two lines that form a right angle are said to be normal, orthogonal, or perpendicular. [12] An angle larger than a right angle and smaller than a straight angle (between 90° and 180°) is called an obtuse angle [11] ("obtuse" meaning "blunt").
Tools such as pens and pencils mark the drawing medium. Other tools such as straight edges, assist the operator in drawing straight lines, or assist the operator in drawing complicated shapes repeatedly. Various scales and the protractor are used to measure the lengths of lines and angles, allowing accurate scale drawing to be carried out.
Angle trisection is the construction, using only a straightedge and a compass, of an angle that is one-third of a given arbitrary angle. This is impossible in the general case. For example, the angle 2 π /5 radians (72° = 360°/5) can be trisected, but the angle of π /3 radians (60 ° ) cannot be trisected. [ 8 ]
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When viewing page information, the wiki software can show additional custom text at the start and end of the page. The top of the information page (before the first section for "Basic information") comes from MediaWiki:Pageinfo-header. It is blank by default, but individual wikis can add content here.
For each pair of lines, there can be only one cell where the two lines meet at the bottom vertex, so the number of downward-bounded cells is at most the number of pairs of lines, () /. Adding the unbounded and bounded cells, the total number of cells in an arrangement can be at most n ( n + 1 ) / 2 + 1 {\displaystyle n(n+1)/2+1} . [ 5 ]
Stichometry existed for several reasons. Scribes were paid by the line and their fee per line was sometimes fixed by legal decree. Authors occasionally cited passages in the works of other authors by giving their approximate line number. Book buyers used total line counts to check that copied texts were complete.
This table contains various statistics on pages tagged with {{Wikipedia Help Project}} on their talk page. Statistics were updated on 2 August 2014. Readability measures were not obtained for pages with <100 words. Some readability measures rely on counting sentences, so give strange results for c
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