This is the 3758th most frequent German word.
richtig
"Richtig" means "correct" or "right" in English.
Here, 'richtig' is used as an adjective meaning 'correct' or 'true' to affirm a statement.
Das ist richtig.
That is correct.
In this case, 'richtig' acts as an adverb describing the manner in which the task was completed, meaning 'correctly' or 'properly'.
Er hat die Aufgabe richtig gelöst.
He solved the task correctly.
Here, 'richtig' serves as an adverb enhancing the adjective 'glücklich', meaning 'really' or 'truly' to emphasize the state of happiness.