Flashcard 3 - 11th Grade Mathematics: Geometry Flashcard Set for the SBAC

130 degrees

The sum of the angles in a triangle is 180 degrees. Since the triangles are congruent, the corresponding angles for the triangles have equal measures so, \(\angle{A} = \angle{X}\). Since \(\angle{X} = 50^o\), the sum of \(\angle{Y}\) and \(\angle{Z}\) is \(180^o-50^o=130^o\).