📖 Math Dictionary

Hypotenuse

/hy-POT-uh-noos/

Definition

The hypotenuse is the longest side of a right triangle. It is always opposite the right angle (90°).

💡Example

In a right triangle with sides 3, 4, and 5, the hypotenuse is 5 (the longest side). Using the Pythagorean theorem: 3² + 4² = 5² (9 + 16 = 25).

🎓Used in Grades

Grades 8-10KS3/GCSE

📚Learn More

pythagorean theorem →trigonometry →

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