right triangles
Ninety-degree corner polygons
Right triangles is the plural of right triangle, a triangle containing one 90-degree angle.
The two sides forming the right angle are called legs; the side opposite is the hypotenuse.
Right triangles are fundamental to trigonometry and geometry: The Pythagorean theorem applies only to right triangles.
- hypotenuseLongest right-triangle side
- legAmbulatory limb
- trigonometryTriangle angle mathematics
- perpendicularAt right angles
- Pythagorean theoremRelates right triangle sides
acute angle · base · congruent · Pythagoras · similar · angles · opposite side · altitude · geometric proofs · theorem · roof · slope · measuring · edge · degrees · law of cosines · ratio · diagonal
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