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Loser66
 one year ago
Is it true that all triangles are isoceles? If you think this is a trivial question, explain the hidden assumption in the proof that all triangles are isoceles.
Please, help
Loser66
 one year ago
Is it true that all triangles are isoceles? If you think this is a trivial question, explain the hidden assumption in the proof that all triangles are isoceles. Please, help

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Loser66
 one year ago
Best ResponseYou've already chosen the best response.1@dan815 What do they want me to do?

dan815
 one year ago
Best ResponseYou've already chosen the best response.0no not all triangles are isocles

Loser66
 one year ago
Best ResponseYou've already chosen the best response.1but I don't understand the rest of the question.

dan815
 one year ago
Best ResponseYou've already chosen the best response.0to show that not all triangles are isocles, pick 3 non equal angles that sum to 180, and prove that a different angle has a different side

Loser66
 one year ago
Best ResponseYou've already chosen the best response.1a right triangle is a perfect proof, right?

Loser66
 one year ago
Best ResponseYou've already chosen the best response.1So, If I say: No, not all triangles are isoceles, and give out the proof, I don't have to do the rest of it, right?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0@Loser66 this is not trivial question. it has geometrical attempt

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0This fallacy has been attributed to Lewis Carroll znd explained by maxwell .

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0https://en.wikipedia.org/wiki/Mathematical_fallacy#Fallacy_of_the_isosceles_triangle

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0if you need any help understanding the proof and the fault in it im always here :P

Loser66
 one year ago
Best ResponseYou've already chosen the best response.1hey, ikram. What should I do for this question? find out the fallacy?

Loser66
 one year ago
Best ResponseYou've already chosen the best response.1Since this proof is not on my book, and I am not allowed to use the internet solution, how can I prove it is a fallacy?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0yes, just mention their used to be a known proof by Lewis Carroll , which says " every triangle is isosceles ", mention the proof and then say why its wrong.

Loser66
 one year ago
Best ResponseYou've already chosen the best response.1ok, Thanks a ton. Let me try. :)

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0in this case its okay if used Internet as reference since this is history and not work like its wrong proof anyway lol

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0you are welcome @Loser66 :) PS: saying every triangle is isosceles s not weird at all, even if you see some triangles do not match, one of eclids postulate said "all right triangles are congruent" and have a proof for it even thought for first look it does not seems alright, okay now ?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0you also can disprove the main question in addition of mention history about it :D

Loser66
 one year ago
Best ResponseYou've already chosen the best response.1I figure out the mistake on the proof. Correct me if I am wrong, please at 6, the case to get 2 triangles are equal is ASA, not AAS, right?

Loser66
 one year ago
Best ResponseYou've already chosen the best response.1It means the side must be between the angles.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0nope, the mistake is in step 3

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Let these two lines meet at a point O., there is no guaranty that O would be inside the triangle not on circumcircle or out of it.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0in general thes line meet in this conditional at point O in circumcircle, there is only one case that it would be inside the triangle which is isosceles and equilateral triangles
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