A triangle has angles of 45° and 90°. What is the third angle?
✓ Correct Answer: Option B
Angles sum to 180°: 180 − 45 − 90 = 45°.
📚 About This PSAT Exam Prep Practice Question
This 1-level PSAT Exam Prep question from the Mathematics topic is part of BrainForge Quiz's free exam preparation library. Each question includes the correct answer and a detailed explanation to help you understand the underlying concept, not just memorize the answer.
How to use this page: Read the question above, consider all four options (A through D), then check the highlighted correct answer and explanation. For active timed practice, start a free PSAT Exam Prep practice test or use flashcards for spaced repetition review.