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The straight lines which form right angles are called perpendicular. [8] Euclid uses right angles in definitions 11 and 12 to define acute angles (those smaller than a right angle) and obtuse angles (those greater than a right angle). [9] Two angles are called complementary if their sum is a right angle. [10]
u+237c ⍼ right angle with downwards zigzag arrow Angzarr ( ⍼ ) is the name of a ghost character -like Unicode symbol of unknown origin and unknown meaning. It was added to Unicode 3.2, but the symbol has been present in works prior to its release.
u+00bb » right-pointing double angle quotation mark (») Guillemets ( / ˈ ɡ ɪ l əm ɛ t / , [ 1 ] [ 2 ] also UK : / ˈ ɡ iː m eɪ / , [ 3 ] US : / ˌ ɡ iː ( j ) ə ˈ m eɪ , ˌ ɡ ɪ l ə ˈ m ɛ t / , [ 4 ] French: [ɡij(ə)mɛ] ) are a pair of punctuation marks in the form of sideways double chevrons , « and » , used as ...
25A0 25B0 25C0 Symbol Name Symbol Name Symbol Name Last Hex# HTML Hex HTML Hex HTML Hex Dec Picture Dec Picture Dec Picture BLACK SQUARE: BLACK PARALLELOGRAM: : BLACK LEFT-POINTING TRIANGLE
A pentagram can be drawn as a star polygon on a sphere, composed of five great circle arcs, whose all internal angles are right angles. This shape was described by John Napier in his 1614 book Mirifici logarithmorum canonis descriptio (Description of the wonderful rule of logarithms) along with rules that link the values of trigonometric ...
The angle brackets or chevrons U+27E8 MATHEMATICAL LEFT ANGLE BRACKET and U+27E9 MATHEMATICAL RIGHT ANGLE BRACKET are for mathematical use and Western languages, whereas U+3008 〈 LEFT ANGLE BRACKET and U+3009 〉 RIGHT ANGLE BRACKET are for East Asian languages. The chevrons at U+2329 and U+232A are deprecated in favour of the U+3008 and U+ ...
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Wolfsangel (German pronunciation: [ˈvɔlfsˌʔaŋəl], translation "wolf's hook") or Crampon (French pronunciation: [kʁɑ̃pɔ̃]) is a heraldic charge from mainly Germany and eastern France, which was inspired by medieval European wolf traps that consisted of a Z-shaped metal hook (called the Wolfsangel, or the crampon in French) that was hung by a chain from a crescent-shaped metal bar ...