False.
To be true a Conjecture must be true for all cases.
true
False. Could be a trapezoid.
false
TRUE
True (from the Latin "expedire")
true
True.
True
True
If you mean edges, true. If you mean faces, false.
false
The statement "two statements here are false" must be true. If that statement is true, then it means one of the other two statements ("one statement here is false" or "three statements here are false") must be false, making the total count of false statements two. If "three statements here are false" were true, it would contradict itself, as it cannot be true if it includes itself as a false statement.
False. He has two.
true
Appealed
False. An enormous number of them are divisible by three.