chọn đúng sai từ câu a b c d và giải thích

To solve this problem, we need to use the properties of a right pyramid. a) Khoảng cách từ C đến mặt phẳng (SAB) là đoạn BC.S: False The distance from point C to the plane (SAB) is the perpendicular distance. Since SAB is a triangle and not a plane, the correct distance should be the perpendicular distance from C to line AB. Therefore, this statement is false. b) BC vuông góc với (SAB): False Since SAB is a triangle and not a plane, it does not make sense to say that BC is perpendicular to SAB. Therefore, this statement is false. c) Khoảng cách từ B đến mặt phẳng (SAC) là đoạn AB: False The distance from point B to the plane (SAC) is the perpendicular distance. Since SAC is a triangle and not a plane, the correct distance should be the perpendicular distance from B to line AC. Therefore, this statement is false. d) SB vuông góc với BC: False In a right pyramid, the slant height (SB in this case) is not necessarily perpendicular to the base (BC). Therefore, this statement is false. Therefore, all statements are false.