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virtus
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9 dots are drawn as below. How many triangles can be formed by joining three dots?
 2 years ago
 2 years ago
virtus Group Title
9 dots are drawn as below. How many triangles can be formed by joining three dots?
 2 years ago
 2 years ago

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virtus Group TitleBest ResponseYou've already chosen the best response.1
dw:1342275033333:dw
 2 years ago

virtus Group TitleBest ResponseYou've already chosen the best response.1
@UnkleRhaukus hope your not here to troll me again
 2 years ago

UnkleRhaukus Group TitleBest ResponseYou've already chosen the best response.0
thats not my style @virtus
 2 years ago

UnkleRhaukus Group TitleBest ResponseYou've already chosen the best response.0
i can see four 2x2 triangles
 2 years ago

UnkleRhaukus Group TitleBest ResponseYou've already chosen the best response.0
16, 1x1 triangles
 2 years ago

UnkleRhaukus Group TitleBest ResponseYou've already chosen the best response.0
i suppose the dont have to be right angles
 2 years ago

ash2326 Group TitleBest ResponseYou've already chosen the best response.0
@virtus do you have options?
 2 years ago

virtus Group TitleBest ResponseYou've already chosen the best response.1
not sure what you mean by options @ash2326 but incase you were wondering, my solution book says 9C3 8
 2 years ago

virtus Group TitleBest ResponseYou've already chosen the best response.1
@UnkleRhaukus you have PARTIALLY redeemed yourself
 2 years ago

UnkleRhaukus Group TitleBest ResponseYou've already chosen the best response.0
i feel better already,
 2 years ago

virtus Group TitleBest ResponseYou've already chosen the best response.1
good to know, why don't you change feeling "good" to "euphoric" by suggesting why the answer is 9C3 8
 2 years ago

UnkleRhaukus Group TitleBest ResponseYou've already chosen the best response.0
say you want to find all the triangle that have the top left as a vertex, how many can you make
 2 years ago

mukushla Group TitleBest ResponseYou've already chosen the best response.1
9C3 triples which are in the same line=9C38 dw:1342275604359:dw
 2 years ago

UnkleRhaukus Group TitleBest ResponseYou've already chosen the best response.0
i count eighteen dw:1342275638118:dw
 2 years ago

UnkleRhaukus Group TitleBest ResponseYou've already chosen the best response.0
19,20dw:1342275746454:dw
 2 years ago

UnkleRhaukus Group TitleBest ResponseYou've already chosen the best response.0
there are so many
 2 years ago

virtus Group TitleBest ResponseYou've already chosen the best response.1
but hows that joining three dots?
 2 years ago

UnkleRhaukus Group TitleBest ResponseYou've already chosen the best response.0
mukushla is right , we are misusing the straight lines because they are not triangles
 2 years ago

mukushla Group TitleBest ResponseYou've already chosen the best response.1
different triangles can be formed by joining 3 of the dotes unless 3 dots are in the same line, so C(3,9)8
 2 years ago

virtus Group TitleBest ResponseYou've already chosen the best response.1
but why is do we minus 8
 2 years ago

mukushla Group TitleBest ResponseYou've already chosen the best response.1
u can count triples of dots that are in the same line just like what i did up there
 2 years ago

UnkleRhaukus Group TitleBest ResponseYou've already chosen the best response.0
this is not a triangle dw:1342276198984:dw
 2 years ago
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