They can be but need not be.
If you convert repeating decimals into a fraction, you see that the repeating decimals are rational.
terminating decimals repeating decimals
terminating decimals non terminating decimals repeating decimals non repeating decimals
Non-repeating decimals is not a word but a phrase. Non-repeating decimals are irrational numbers.
terminating decimals and repeating decimals
Repeating decimals is periodische Dezimalzahlen in German.
Terminating and repeating decimals are rational numbers.
No, Albert Einstein did not invent repeating decimals.
Not all decimal representations are repeating decimals.
No.
Terminating and repeating decimals are.
No because non-repeating decimals may be terminating.But suppose you consider terminating decimals as consisting of repeating 0s. That is, 1/8 = 0.125 = 0.12500....Then all non-repeating decimals are irrational.