求翻译GRE数学,谢谢
Figure3showsparallelogramRSTU.SidesRUandSTarehorizontal,withSTabove,and
slightlytotheleftofsideRU.DiagonalSU,whichextendsfromvertexSattheupperleftofthe
parallelogramtovertexUatthelowerrightoftheparallelogram,dividestheparallelograminto
twotriangles,RSUandUST;andtheangleatvertexSinto2adjacentanglesRSUandUST.ThemeasureofangleRSUisxdegrees,andthemeasureofangleUSTisydegrees