There is no such thing as a "triangular" number (as a number), a triangular number or triangle number counts the objects that can form an equilateral triangle. One object can and Three objects can but not Two objects.
Well, as an identical twin myself, I believe there is a one out of twelve chance of having identical twins, although, I'm not 100% sure....
Identical and fraternal twins typically share many similar characteristics
Here is one way: /\ --- /\/\ ----- These are {45°, 45°, 90°} triangles. There are 3 on the bottom row, and 1 on top. Actually, any four identical isosceles triangles would work.
Their 3 sides and 3 interior angles will be identical
Triplicate
yes
mass production was making lots of one type of good, all of the objects are identical
trio
In computer programming, an "object" is a unit of data, that is generally stored in memory. Two objects are generally considered to be identical if they are actually represented by the same bits in memory, and changing the one will change the other. Objects are merely equivalent, if they compare equal with the equality function and can be used indistinguishably until changed. For example, if x = 3 and y = 3, then x and y are equivalent but not identical.
If you drop two objects in a tube that has no air in it, they'll both land at the same time, and it doesn't matter what they weigh.
Nothing
Any 2 identical objects.
When 2 identical objects are placed on either side of the axis.
Yes, if the objects are side by side or at least in identical gravitational fields.
If the two objects are the same size and made of exactly the same amount of the exact same stuff then no.
"Identical" when talking to people, and "Congruent" in your math work.