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Euclid's puzzling parallel postulate - Jeff Dekofsky

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View full lesson: http://ed.ted.com/lessons/euclid-s-puzzling-parallel-postulate-jeff-dekofsky Euclid, known as the "Father of Geometry," developed several of ...


\Jeff Dekofsky\ \The Leading Sheep Studios\ Euclid \Euclidean geometry\ \Non-Euclidean math mathematics \parallel postulate\ TED-Ed TEDEducation \TED Ed\ \Father of geometry Einstein \Albert Einstein\ Euclid euclid baffling unclear obscure involved abstruse hard knotty explicit clear Greek to me abstract clear as dishwater complex complicated deep enigmatic esoteric heavy hidden incomprehensible intricate muddy perplexing profound puzzling recondite subtle unfathomable vague cryptic doubtful dubious enigmatical equivocal inconclusive indefinite indeterminate inexplicit multivocal opaque polysemous questionable tenebrous uncertain unintelligible Daedalean Gordian bewildering byzantine circuitous confused convoluted crabbed discursive disordered disturbing entangled excursive impenetrable inscrutable interwoven jumbled knotted labyrinthine mazy meandering mingled mixed muddled paradoxical rambling round-about sinuous snarled sophisticated tangled tortuous undecipherable winding arduous can of worms difficult elaborate fancy gasser hi-tech interlaced mega factor problematic troublesome various wheels within wheels serpentine Delphian Delphic ambiguous apocryphal arcane cabalistic dark evasive inexplicable murky mysterious mystic mystical mystifying occult oracular secretive strange uninformative veiled Puzzling coordinate lateral alongside equidistant laterally coextending coextensive zigzag crooked skewed agnate like equal uniform alike unlike unequal unalike separate double twin match kin opposite reverse agree liken equate copy skew accord answer attune be in harmony blend click cohere coincide concert concord concur conform consort correspond fall in with fit get along with go hand in hand go together go well with harmonize jibe parallel square suit synchronize tally affiliated allied analogous cognated comparable connate consonant corresponding incident kindred similar Xerox akin approximate associated carbon copy cognate concurrent correspondent dead ringer ditto duplicate equivalent even facsimile identical indistinguishable look-alike matched matching mated proportionate related resembling same same difference spitting image undifferentiated convertible homologous interchangeable affinity alikeness comparison correlation correspondence equivalence homology likeness metaphor relation relationship resemblance semblance simile similitude acclimatize accommodate acculturate accustom adapt become like become similar blend in go native homogenize homologize intermix mingle standardize analogy assimilate Parallel mirror image reflection alternative alternate quantum science posit theorize advance guess affirm assume propose assert suppose premise aver estimate deny reject accept ascertain be afraid be inclined to think conclude conjecture consider count upon deduce deem divine expect fall for fancy find gather get the idea have a hunch have sneaking suspicion hypothesize imagine infer judge postulate predicate presume presuppose speculate surmise suspect think understand acceptance accepting assuming belief expectation hunch hypothesis inference postulation presumption presupposition shot shot in the dark sneaking suspicion stab supposal supposition suspicion theorization theory adage aphorism apothegm device dictum fundamental law maxim moral precept proposition proverb saying theorem truism truth antecedent assumption authority axiom backbone background backing base bedrock cause center chief ingredient core crux data essence essential evidence explanation footing hard fact heart infrastructure justification keynote keystone nexus nucleus principal element principle proof reason root rudiment sanction security source substratum support underpinning warrant concept credence credo creed doctrine dogma faith gospel gospel truth idea ideology opinion say-so tenet accredit admit attach weight to be certain of be convinced of be credulous be of the opinion buy conceive count on credit give credence to have have faith in have no doubt hold keep the faith lap up place confidence in presume true reckon on regard rest assured swallow swear by take as gospel take at one's word take for granted take it trust basis believe Postulate Jeff jeff boy guy sir son gent Mr. girl beau papa swain uncle woman brother father fellow gentleman grandfather husband boyfriend nephew spouse male man top main noted best arch first least extra minor last low final beforehand earlier early foremost forward in front in the forefront in the lead leading previously prior avant-garde breakthrough cutting-edge excellent exceptional extreme higher late leading-edge liberal precocious progressive radical state-of-the-art unconventional advanced advancing ahead along ante antecedently at an advantage at the head before fore forwards in the foreground onward onwards precedent precedently preceding previous progressing to the fore accomplished champion chief consummate expert finished greatest head highest major master preeminent premier primary outstanding red-letter A-1 ace bad beyond compare boss capital choicest cool culminating finest first-class first-rate incomparable inimitable matchless nonpareil number 1 optimum out-of-sight paramount peerless perfect premium prime primo principal sans pareil second to none super superlative supreme terrific tops tough transcendent unequaled unparalleled unrivaled unsurpassed advance banner Leading gloom vapor darkness fog smoke puff smog mist veil steam pother murk frost overcast smother scud haze nebula billow dimness rack film brume haziness pea soup woolpack light follower bourgeois yes man emulator Babbit fowl herd swine cattle flock horses beasts hogs pigs cows fact guide lead doyen flunky lackey minion pawn puppet stooge toady doormat fawner fogginess mare's tail nebulosity obscurity ol' buttermilk sky sheep thunderhead brick in a wall conventionalist one of the herd rubber stamp traditionalist animals domestic farm animals livestock forerunner apple-polisher ass-kisser assenter bootlicker brownnose camp follower flatterer groveler kowtower sycophant underling cloud conformist stock bellwether Euclid euclid analytical scientific measurable numerical algebraic division addition calculus geometry algebra figures numbers decrease reduction algorithmic arithmetical computative geometrical math trigonometric calculation multiplication subtraction trigonometry mathematical mathematics Math easy hard time wasting rape die math algebra figures numbers decrease reduction general education history language liberal studies literature mathematics philosophy science trivium and quadrivium liberal arts Mathematics math algebra figures numbers decrease reduction addition calculation calculus division geometry multiplication subtraction trigonometry mathematics Geometry school geometery g-met torture evil people boring geometria pundit doctor sage genius dumbo dumdum body sharp smart acute alert astute aware brainy clever keen knowing quick stupid dreary somber cloudy dusky murky unaware doleful typical pale pastel dull slow dark obscure black gloomy unhappy normal light gifted bright expert whip inept dulled acumen knack prowess ability wisdom talent prodigy flair bent brain aptness turn head power reach adept faculty grasp mature lack weakness amateur idiot imbecile scholar egghead savant whiz thinker wizard wise shrewd canny sapient foolish lazy idiotic blunt obtuse Einstein academician highbrow intellect intellectual mastermind advanced brilliant clear-headed discerning eggheaded having smarts ingenious inventive precocious quick-witted whiz kid wide-awake accomplished knowledgeable masterly penetrating profound talented accomplishment acuteness aptitude astuteness brilliance capability capacity creativity discernment endowment imagination inclination ingenuity inspiration intelligence inventiveness originality percipience perspicacity precocity propensity sagacity superability understanding virtuoso academic bluestocking illuminato intelligentsia literato longhair philosopher avant-garde braintruster
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