Identify all sets to which the number 3.1214122144 . . belongs. choose from irrational,rational,whole,and integer

It is an irrational number. That is because rational numbers can be put into fractions. But because this decimal goes on forever, you can't put it into a fraction. This is also not a whole number or an integer. Whole numbers and integers do not have any decimals or fractions in them, but this number is a decimal. Therefore, this number is irrational.
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Every side has to be the same as the other sides of the other triangle if they are then yes the triangles are congruent