First, verify the triangle is right-angled:

Sun, 03 May 2026 14:24:45 +0000

# How to Verify If a Triangle Is Right-Angled: A Step-by-Step Guide When working with triangles—whether in geometry homework, engineering design, or mathematical proofs—determining whether a triangle is right-angled is essential. A right-angled triangle plays a central role in trigonometry, construction, navigation, and computer graphics. But how do you reliably confirm it’s a right angle? This article provides a clear, step-by-step guide on how to verify if a triangle is right-angled, ensuring accuracy and confidence in your results. ## Why Verifying a Right-Angled Triangle Matters A right-angled triangle satisfies the Pythagorean theorem:
a² + b² = c², where c is the hypotenuse (the side opposite the right angle) and a, b are the other two sides. This property makes identifying a right triangle relatable and crucial in many practical and theoretical applications.