What is the arc length of a 90° sector with radius 8? A 4π B 2π C 8π D 16π ✓ Correct Answer: Option A Arc length = (θ/360°) × 2πr = (90/360) × 2π(8) = (1/4)(16π) = 4π. Practice SAT Exam Prep Quizzes → Browse All Questions Study Flashcards