Final answer:
The statement is true; in major triads, the interval from the root to the fifth is a perfect fifth.
Step-by-step explanation:
The statement that the interval from the root to the fifth in major triads is a perfect fifth (P5) is true. In music theory, a major triad consists of a root note, a major third, and a perfect fifth.
When constructing a major triad, the interval between the root and the third is a major third, and the interval from the root to the fifth is indeed a perfect fifth. For example, in a C major triad, the notes are C (the root), E (the major third above C), and G (the perfect fifth above C).