Pythagorean Theorem Calculator › Legs 3 and 12
Hypotenuse of 3 and 12
Hypotenuse = √153 ≈ 12.369317
For a right triangle with legs 3 and 12, the hypotenuse c satisfies a² + b² = c²:
3² + 12² = 9 + 144 = 153, so c = √153 ≈ 12.369317 (3√17).
Other triangles with leg 3
3 & 1 · 3 & 2 · 3 & 3 · 3 & 4 · 3 & 5 · 3 & 6 · 3 & 7 · 3 & 8 · 3 & 9 · 3 & 10 · 3 & 11
Frequently asked questions
What is the hypotenuse of a triangle with legs 3 and 12?
It is √153 ≈ 12.369317 (or 3√17 in simplified radical form). Using a² + b² = c²: 3² + 12² = 153.
Is 3, 12, … a Pythagorean triple?
No. The hypotenuse √153 is not a whole number, so 3 and 12 do not form a Pythagorean triple with an integer hypotenuse.