If a triangle has sides 5, 12, and 13, is it a right triangle?

A Yes

B No

C Cannot be determined

D Only if it has a 90° angle marked

✓ Correct Answer: Option A

Check: 5² + 12² = 25 + 144 = 169 = 13². It satisfies the Pythagorean theorem, so yes.

💡 Why is A) the correct answer?

The correct answer to the question "If a triangle has sides 5, 12, and 13, is it a right triangle?" is Option A: Yes.

The other options — B) No, C) Cannot be determined, D) Only if it has a 90° angle marked — are incorrect for this SAT Exam Prep question. As explained above: Check: 5² + 12² = 25 + 144 = 169 = 13². It satisfies the Pythagorean theorem, so yes.

📚 About This SAT Exam Prep Practice Question

This 1-level SAT Exam Prep question from the Math (Calculator) 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 SAT Exam Prep practice test or use flashcards for spaced repetition review.

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If a triangle has sides 5, 12, and 13, is it a right triangle?

✓ Correct Answer: Option A

📚 About This SAT Exam Prep Practice Question

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