noun
hypotenuse; oblique side
In geometry, the side opposite the right angle in a right triangle. Also used more generally for an oblique line or side in other contexts.
直角三角形の斜辺は最も長い辺です。
The hypotenuse of a right triangle is the longest side.
この図形の斜辺の長さを計算してください。
Please calculate the length of the oblique side of this figure.