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Two right triangles are congruent if the hypotenuse and an adjacent angle of the one are equal respectively to the hypotenuse and an adjacent angle of the other.

The valet and the robber-chief now moved away from the spot where they had stood to hold the above conversation; and the moment they had turned the adjacent angle of the mansion, Nisida hastened to regain her apartment by the private staircase—resolving,  however, to see Wagner as early as possible in the morning.

Lying close to another object; a word applied to the relative situations of capes or bays from the ship.—Adjacent angle is one immediately contiguous to another, so that they have one common side.

He then divides the exterior of these angles, by drawing a line parallel with the opposite side of the triangle, and immediately perceives that he has thus got an exterior adjacent angle which is equal to the interior.