Calculate the length of the hypotenuse of a right triangle with legs 9 cm and 12 cm.

Tue, 05 May 2026 03:19:31 +0000

**Write the length of the hypotenuse of a right triangle with legs 9 cm and 12 cm** Curious about how to find the hypotenuse of a right triangle when you know the two perpendicular legs? It’s a foundational math skill with everyday relevance, from construction projects and home improvements to fitness testing and design. One common example people explore is calculating the hypotenuse of a right triangle with legs measuring 9 cm and 12 cm—a simple yet meaningful problem that combines geometry and practical application. Using the Pythagorean theorem, the hypotenuse squared equals the sum of the squares of the two legs. That means: hypotenuse² = 9² + 12². Whether you’re calculating dimensions for a project or satisfying mathematical curiosity, doing this step-by-step reveals a clear, precise answer. Calculate the length of the hypotenuse of a right triangle with legs 9 cm and 12 cm leads directly to:
9² = 81
12² = 144
81 + 144 = 225
√225 = 15