L heure au cadran17/52 Feuille calculs angle de retournement rabattement Segment OM =B21*TAN(RADIANS(B20)) Segment MP =B23*TAN(RADIANS(90-B5)) =B21/COS(RADIANS(B20)) Segment HM =B23/COS(RADIANS(90-B5)) Segment OP =B21/COS(RADIANS(B27)) =DEGRES(ATAN(B26/B21)) Angle Segment HP =B27+B30 Rotation