A right triangle has legs of 3 and 4. What is the hypotenuse? A 7 B 5 C 6 D 25 ✓ Correct Answer: Option B Pythagorean theorem: c² = 3² + 4² = 9 + 16 = 25, so c = 5. Practice PSAT Exam Prep Quizzes → Browse All Questions Study Flashcards