Hypotenuse of a right triangle definition July 8, 2019 16 32 64 128 Hypotenuse of a right triangle definition geometry Hypotenuse of a right triangle math definition Definition of hypotenuse and legs for a right triangle Hypotenuse of a right triangle In a right triangle one angle measures x° where sin ° = x 4 5 . what is cos(90° − °) x